I''ve had this problem off and on and it's driving me crazy trying to figure out what's going on. My board uses an LCD, and for some reason, I can program a chip and everything works fine, then reprogram the same chip, just minutes later, no code changes or anything, and some of the text won't display on the screen. Reprogram it and it will work fine. I'm using MeLabs 3.31. Any ideas what could be going on?