Select All Unused in Swatches selects colors used in Repeat objects
Repeat Objects are strange objects.
If colors are only inside a repeat object, using Select All Unused will select the swatches even when use in the repeat object.
Another problem is that Add Used Colors command in Swatches ignores colors from Repeat objects: http://illustrator.uservoice.com/forums/601447/suggestions/51093658
Spotted by Jean-Claude Tremblay
More related problems:
- Repeat objects ignore Select > Inverse command: http://illustrator.uservoice.com/forums/601447/suggestions/50797535
- Have 'Select All Unused' in the Swatches panel look inside symbols: http://illustrator.uservoice.com/forums/601447/suggestions/42368422
- Select Unused Swatches does not select the second black swatch in Grays color group: http://illustrator.uservoice.com/forums/601447/suggestions/49256807