I discovered this in MS Word, but it might apply to other X applications. I was using an old Word Perfect converted document in Word X, and when I tried to print, Word constantly and unexpectedly quit.
I realized the document's name had a date in it in this format: mm/dd/yy. Word doesn't allow forward slashes (/) in filenames anymore (although the Finder does). The document printed perfectly after I renamed it with this date format: mm-dd-yy. Is this a Windows compatibility "feature?"
[Editor's note: Anyone have any information on officially allowed filenames, either in Office or OS X in general?]
Mac OS X Hints
http://hints.macworld.com/article.php?story=20020330123727169