I've never had this happen except once. On a windoze ME crash, I had nothing in a file because the crash occurred during the save. Not knowing at the time that bryce saves in a temp file as well, I went to the restore point and was able to bring back an earlier version of my file. If you had winME and it auto reverted, that could cause it. Also,if after your last save, you made changes, or deleted things, what Stephen Ray makes sense. What Cshaftoe says was similar to my experience. If you had no other glitches, then your thought that you didn't save makes sense, however, bryce does ask before you exit. Best wishes to you. Its not a bug that I know of. You might want to make sure you have the patch which is availabe at www.corel.com cuz it does fix a lot of bugs.