I am a (retired) software tester, so I'm painfully aware of the "reproduceability situation." My issue does come up with some regularity, however. The way I use ImgBurn is to burn a number of (different) CDs, one after the other. After a number of burns, I end up with an error that there is insufficient memory (next time I get it, I'll capture the exact text.) Closing and restarting ImgBurn resolves the problem. Has anyone else met this?