Yea, Poser does that to me once in a while. Come to think of it, so does Photoshop, Windows XP, Microsoft Word, Firefox and Mac OS X Panther, oh and Tiger too. Come to think of it pretty much every piece of software I have ever run since my Atari 400 has crashed, and almost never when I had not spent hours doing something. Thats why "Save" is always two clicks away.