I now encountering this error in Illustrator 10: "File has become corrupted cannot save .pdf" (even though we are trying to save it as an .ai file and not a .pdf).
I’m all working from the same Adobe Illustrator ... and all are getting the same errors now.
Tried save as, save a copy, and exporting and it just won't save. Then I trashed the preferences file....still no luck.
Ideas?