monokano
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5 votesmonokano
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7 votes
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9 votes
修正は最新の30.3一般リリースに反映されています。アップデート後、問題が解消されているか確認し、引き続き問題が発生する場合はご報告ください。
開発チームによると、macOS版Illustratorのフォント処理方法を変更し、一貫性を向上させ、サポートされていないシステムリソースへの依存度を低減したとのことです。その結果、Appleのガイドラインに従い、Illustrator 30.3以降ではシステムフォントが使用できなくなります。
The fix has been pushed into the latest 30.3 general release. Please update, check, and comment back if it still happens.
According to the team, they changed font handling in Illustrator on macOS for better consistency and reduced reliance on unsupported system resources. As a result, system fonts won’t be accessible in Illustrator 30.3 and later, according to the Apple’s guidelines.
An error occurred while saving the comment monokano
commented
ご確認ありがとうございます。
幸いにもAdobe Fontsに「Century Gothic Pro」があるので、「Century Gothic」はそれに置き換えることで解決できるでしょう。---
Thank you for confirming.
Fortunately, Adobe Fonts offers “Century Gothic Pro,” so replacing “Century Gothic” with it should resolve the issue.An error occurred while saving the comment monokano
commented
The attached PDF was created in Word using Century Gothic and then exported to PDF. A typical Mac user would receive a PDF like this from a client, open it in Illustrator, and use Century Gothic from there.
2026 (30.2.1)
"Missing fonts" is displayed, but the font is eventually recognized after a delay.2026 Beta (30.4.0 #87)
"Missing fonts" is displayed, and the font continues to go unrecognized thereafter.macOS Ventura 13.7.5
macOS Sequoia 15.7.4---
添付したPDFは、WordでCentury Gothicを使い、それをPDFに書き出したものです。一般のMac版ユーザーはこのようなPDFをクライアントから支給され、これをIllustratorで開き、Century Gothicを使うというケースになるでしょう。
2026 (30.2.1)
「環境にないフォント」が表示されるものの、遅延してフォントが認識されます。2026 Beta (30.4.0 #87)
「環境にないフォント」が表示され、以降もフォントは認識されません。An error occurred while saving the comment monokano
commented
Tested in 2026 Beta (30.4.0 #80). The results suggest that what was “fixed” may not be the actual bug.
Background: Century Gothic is categorized as a “Document-support font” on macOS (https://support.apple.com/en-us/120414). These fonts are not available system-wide, but can be accessed by apps that request them by name.
- v28 (2024): Century Gothic is recognized and works correctly.
- v29 (2025) and later: Century Gothic is recognized and usable, but causes garbled text in the compatibility PDF in .ai files.
- This beta: Century Gothic is no longer recognized at all — a “Missing Fonts” alert appears.The regression in this beta suggests that the fix may have been to block Illustrator from accessing Document-support fonts entirely, rather than correcting how those fonts are handled in the compatibility PDF section. If that is the case, the underlying issue has not been resolved — it has simply been hidden.
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2026 Beta (30.4.0 #80) でテストしました。結果から、今回の「修正」は本来のバグを直したものではない可能性があります。
背景：Century Gothic は macOS の「書類に対応したフォント」に分類されるフォントです（https://support.apple.com/ja-jp/120414 参照）。このカテゴリーのフォントはシステム全体には公開されておらず、アプリがフォント名を指定してリクエストした場合のみ使用できます。
- v28 (2024)：Century Gothic を正常に認識・使用できる。
- v29 (2025) 以降：Century Gothic は認識・使用できるが、.ai ファイルの互換 PDF 領域で文字化けが発生する。
- 今回のベータ版：Century Gothic 自体が認識されなくなり、「環境にないフォント」のアラートが表示される。このベータでの挙動から推測すると、今回の「修正」は互換 PDF 領域での「書類に対応したフォント」の処理を正しく直したのではなく、Illustrator が「書類に対応したフォント」にアクセスできないようにしたものではないかと思われます。もしそうであれば、根本的な問題は解決されておらず、見えなくされただけということになります。
An error occurred while saving the comment monokano
commented
2024では発生せず、2025で発生するということは、「2025のバックグラウンド機能に新たなバグがある」と考えられるところです。
バックグラウンド機能のバグは、通常は不規則に発生するので、再現手順を確定できず、修正も困難というかなり厄介な問題を抱えています。
その中でも、再現手順を確定できたものは修正されました。
https://illustrator.uservoice.com/forums/601447-illustrator-desktop-bugs/suggestions/47176633今回のバグも再現手順を確定できたものなので、修正されることを期待するところです。
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Since this doesn’t occur in 2024 but does occur in 2025, it suggests that ‘there’s a new bug in the 2025 background function.’
Background function bugs typically occur irregularly, making it impossible to establish reproduction steps and difficult to fix - this presents quite a troublesome problem.
Among these, the ones where reproduction steps could be established have been fixed.
https://illustrator.uservoice.com/forums/601447-illustrator-desktop-bugs/suggestions/47176633Since reproduction steps have been established for this current bug as well, I expect it to be fixed.
monokano
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commented
macOS Ventura 13.7.5
Illustrator 2025 (29.8.1)「環境設定 > ファイル管理」の「バックグラウンドで○○」をチェックONにしていると再現しました。チェックOFFにすると防げると思います。
aiファイルの互換PDFに異常が発生するのは、総じてバックグラウンド機能が原因であることが経験則として判明しています。バックグラウンド機能が搭載された2020 (24) 以降からずっと問題になっています。
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This bug occurred when the background setting in 'Preferences > File Handling' was checked ON. I think it can be prevented by unchecking it (turning it OFF).The abnormalities occurring in compatible PDFs of AI files are generally caused by using the background function. This has been an ongoing problem ever since the background function was implemented in 2020 (version 24) and onwards.
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14 votes
An error occurred while saving the comment monokano
commented
2022 (26.5.2)
2023 (27.9.6)
2024 (28.7.10)
2025 (29.8.5)
2026 (30.3.0)
すべて再現しました。おそらく当初からこの挙動だったのでしょう。
2025以降の「選択アートボードにペースト」で致命的になったわけですね。
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I was able to reproduce this in all of the above versions. This behavior was likely present from the very beginning.
It became critical with the introduction of "Paste on Selected Artboards" in 2025 and later.monokano
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6 votes
An error occurred while saving the comment monokano
commented
In 2026 (30.3), macOS “Document-support fonts” are no longer automatically recognized. This may share the same root cause.
monokano
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16 votes
Reported to be resolved in the latest general 30.3 build, Please refer to the comment by @monokano with the explanation of the current behavior. Kindly comment back if your experience with 30.3 differs from it.
monokano
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commented
2023 (27.9.6)
2024 (28.7.10)
2026 (30.3)上記のバージョンで検証してみました。
結果は、この問題は 2026 (30.3) で修正されたと判断できます。前提として、回転メタデータの扱いが変更されたのは2024 (28) です。
問題は、その仕様変更が、2023 (27) 以下のファイルを開いた時に悪影響を与えて、見た目の向きが変化してしまうことです。2026 (30.3) では、回転メタデータの扱いを2024以降の仕様のままにして、2023以下のファイルを開いた時に「見た目の向きが同じ」になるように調整しています。
見た目の向きが変わってしまうのが問題だったので、変わらなくなった 2023 (30.3) で修正されたと判断できます。
添付の検証.pdfを参照してください。
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I tested with the above version.
My conclusion is that this issue was fixed in 2026 (30.3).As background: the change in how rotation metadata is handled was introduced in 2024 (28).
The problem was that this behavior change had an adverse effect when opening files saved in 2023 (27) or earlier, causing the visual orientation to change.In 2026 (30.3), the rotation metadata handling follows the 2024 and later specification, while ensuring that the visual orientation remains the same when opening files saved in 2023 or earlier.
Since the problem was that the visual orientation changed, and it no longer does, I conclude that this has been fixed in 2026 (30.3).
Please refer to the attached 検証.pdf. -
19 votes
An error occurred while saving the comment monokano
commented
https://illustrator.uservoice.com/forums/601447-illustrator-desktop-bugs/suggestions/50230332
A related bug report has been filed showing that the “Paste on Selected Artboards” behavior breaks ExtendScript and AppleScript workflows: when a script creates a new artboard, both the original and the new artboard become selected, causing subsequent Paste in Front operations to paste to all selected artboards unintentionally. Since there is no scripting API to control artboard selection state, there is currently no workaround from within a script.
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「選択したアートボードにペースト」の挙動がExtendScript / AppleScriptのワークフローに与える問題についての関連バグ報告です。スクリプトで新規アートボードを作成すると、元のアートボードと新しいアートボードの両方が選択状態になり、その後の「前面へペースト」が意図せず全選択アートボードにペーストされてしまいます。アートボードの選択状態を制御するスクリプトAPIが存在しないため、スクリプト内からの回避手段もありません。
monokano
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26 votesmonokano
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1 vote
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commented
This is likely a background save bug.
See also:
What Does “Create PDF Compatible File” Mean in Adobe Illustrator?
https://note.com/monokano/n/n9df9cfc584f4 -
27 votes
An error occurred while saving the comment monokano
commented
macOS Ventura 13.7.5
Illustrator 2026 (30.3)I have confirmed this bug. After placing the attached "sRGB.png" as a linked file and selecting "Color Settings..." from the menu, the setting changed to "Custom."
- Profile mismatch is not a factor
- The issue occurs both when dropping from the desktop and when using the menu “Place...”monokano
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4 votesmonokano
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34 votes
Claimed to be fixed in the latest 30.3 general release. Please update, check, and comment back if it still happens.
An error occurred while saving the comment monokano
commented
2026 (30.3)
I have confirmed that this bug has been fixed. Thank you.monokano
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20 votes
An error occurred while saving the comment monokano
commented
@Egor
Thank you for checking. I can reproduce this on the following macOS environments:macOS Ventura 13.7.5
macOS Sequoia 15.7.4It appears to be macOS-specific.
monokano
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7 votes
Reported to be fixed in the latest general 30.3 release. Please update and check if it works as it should now and comment back, if not
An error occurred while saving the comment monokano
commented
2026 (30.3.0)
I have confirmed that this bug has been fixed.. Thank you.An error occurred while saving the comment monokano
commented
To reproduce this bug, follow these steps:
- Save (or Save As) the file.
- Open the saved file.
- Save (or Save As) the file again.
- Open the saved file.monokano
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4 votesmonokano
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Acrobat layers duplicate excessively in AI file’s compatible PDF
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Screenshot%202025-11-18%20at%204.26.18%E2%80%AFPM.png 63 KB -
Screenshot%202025-11-18%20at%204.16.59%E2%80%AFPM.png 44 KB -
Screenshot%202025-11-18%20at%204.10.01%E2%80%AFPM.png 74 KB -
Screenshot%202025-10-30%20094255.png 125 KB -
Screenshot%202025-10-30%20094325.png 40 KB -
Illustrator%20corrupted%20file%20event.jpg 51 KB
23 votesThe issue mentioned in this thread has been fixed in Illustrator v30.1 and v29.8.4
An error occurred while saving the comment monokano
commented
@Nicole
This is indeed a background save bug. However, it is not the Acrobat layers bug. It is a new bug introduced in 2026 (30.2.1), where linked images disappear in the PDF data of the PDF-compatible file. I have confirmed that it has been fixed in the beta.An error occurred while saving the comment monokano
commented
@Camille
Your issue is the malformed compatible PDF generation. This has been occurring for many years since the 2020 (v24), when background saving was introduced. It occurs randomly, so the triggering conditions cannot be identified. Some users have empirically found that disabling background saving can prevent this issue.An error occurred while saving the comment monokano
commented
The bug posted here has been fixed in the following versions:
2025 (29.8.4)
2026 (30.1)If you experience issues with compatible PDFs in these or later versions, please uncheck "Save in Background" and "Export in Background" in Preferences.
An error occurred while saving the comment monokano
commented
AI files contain two different types of data: “native data” and “PDF data.”
When PDF compatibility is enabled, the system generates PDF data that should have the same appearance as the native data.
However, sometimes this PDF data does not match the appearance of the native data. This issue has become frequent since version 2020 (24) and later, when the background functionality was introduced.All applications except Illustrator only recognize the PDF data within AI files. InDesign also links AI files as PDF files. The abnormalities observed are likely due to failures in PDF data generation.
An effective method to avoid this issue is to disable the background functionality.
While Acrobat layer abnormalities occur in PDF data, PDF generation defects are a different bug from this.
monokano
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8 votes
修正は最新の30.3一般リリースに反映されています。アップデート後、問題が解消されているか確認し、引き続き問題が発生する場合はご報告ください。
The fix has been pushed into the latest 30.3 general release. Please update, check, and comment back if it still happens.
An error occurred while saving the comment monokano
commented
2026 (Beta) (30.4.0 #103)
このバグが修正されたことを確認しました。完璧です。ありがとうございます。
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I have confirmed that this bug has been fixed. Perfect. Thank you.monokano
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7 votesmonokano
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32 votes
修正は最新の30.3一般リリースに反映されています。アップデート後、問題が解消されているか確認し、引き続き問題が発生する場合はご報告ください。
The fix has been pushed into the latest 30.3 general release. Please update, check, and comment back if it still happens.
An error occurred while saving the comment monokano
commented
2026 Beta (30.4.0 #103)
リンク配置、埋め込み、両方ともバグ修正されたのを確認しました。素晴らしい。---
I have confirmed that the bug has been fixed for both linked and embedded placements. Excellent work.An error occurred while saving the comment monokano
commented
PDF書き出しでモノクロ2階調画像にグレースケールのダウンサンプルが適用されてしまうバグは、下記の経緯があります。
1. このバグは10年以上前から「埋め込みのモノクロ2階調画像」ですでに発生していた（どの時点かは不明）
2. 2025 (29.6) で、「埋め込みではないリンク配置のモノクロ2階調画像」にもこのバグが発生するようになった埋め込みの有無にかかわらずバグが発生しないようにする必要があります。
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これらのことはフォーラムの投稿から明らかになりました。
https://community.adobe.com/t5/illustrator%E3%83%95%E3%82%A9%E3%83%BC%E3%83%A9%E3%83%A0-discussions/pdf%E3%81%8C%E5%8A%A3%E5%8C%96%E3%81%97%E3%81%A6%E3%81%97%E3%81%BE%E3%81%84%E3%81%BE%E3%81%99-cc2025/td-p/15391123?profile.language=jamonokano
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20 votes
Everyone - we want some more information about this issue.
Is any export (PNG) done from Illustrator for any such (glitched preview) files showing the same thumbnail issue or not?
Or, is the issue happening only with the thumbnail of the file as seen in the Mac / Win folder preview or while placing into another application?
An error occurred while saving the comment monokano
commented
2026 (30.2.1)
In this version, a new bug has appeared in the new background save method. When image files such as PSD or JPG are placed as linked files (not embedded) and the .ai file is saved, the images very often disappear in the PDF data of the PDF compatible file.Note: I have confirmed that this bug does not occur in 2026 Beta (30.4.0 #87).
For more information on the PDF compatible file, please refer to the following:
What Does “Create PDF Compatible File” Mean in Adobe Illustrator?
https://note.com/monokano/n/n9df9cfc584f4An error occurred while saving the comment monokano
commented
The new background save method "Quick Save" in Illustrator 2026 (30.0) was causing malformed compatible PDF generation. The new method had actually been silently implemented in 2025 (29) as well, triggering the same bug.
This issue was fixed in 2026 (30.1) and 2025 (29.8.4). However, the problems that background saving has had since 2020 (24) still appear to persist.
An error occurred while saving the comment monokano
commented
Illustrator files have two types of previews: "bitmap image" and "compatible PDF data." The issue being discussed here concerns the compatible PDF.
Compatible PDF is not just used for previews — it serves as actual working data in many contexts, including linked placement in InDesign documents, import into After Effects, and more. It is a critically important component of the file.
Compatible PDF must be generated with an appearance that is completely identical to the native data when saving an .ai file. However, ever since the background save feature was introduced, there has been a long-standing bug where the compatible PDF is generated with a different appearance. Moreover, because it occurs randomly, the exact conditions that trigger it cannot be determined.
Some users have learned through experience that disabling the background save feature prevents this issue.
monokano
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I was able to reproduce this.
The attached PDF contains the following text, one item per line:
-0-
-1-
-2-
-3-
-4-
-5-
-6-
-7-
-8-
-9-
Steps: Open the PDF in Illustrator → Select All → Copy → click with the Type tool on the same document → Paste.
The results are as follows. The 2025 behavior is clearly the correct one.
2025 (29.8.5)
-0--1--2--3--4--5--6--7--8--9-
2026 (30.3)
-9--8--7--6--5--4--3--2--1--0-