This is driving me a little crazy. I've been printing envelopes with pretty much no problems for years and years. Finally switching everything over to a new iMac (OS X 10.6.7) and shutting down the PC. Word 2008. The envelope I use doesn't show up on the list (6 3/4) so I created a custom envelope. Everything looks ok on the screen, print preview, etc but when I try to print I get a "short paper" error message on my Lexmark x24n. Prints fine on 8.5x11 sheet and lines up with where everything should be. I've tried tweaking the envelope dimensions and everything I can see. Any suggestions?