When you "save as," the curser automatically appears at the end of the document name in the document name field - i.e. right after the file name extension. I never need to edit the file name extension, as I can do that in the dropdown menu, but I DO need to edit the name of the document. This, combined with the fact that there's now a lag of a few seconds before you can type in the document name field (submitted in separate comment), is making saving different versions of the same file veeeery annoying.