Finishing an update for my document encryptor app, I discovered that the default behavior of the rich edit textbox control (copy selected text to clipboard) had an interesting effect of locking up any application that that text was pasted into. So I had to override that functionality and put the text into the clipboard myself to prevent my program from becoming a weapon of mass lockup.
Only winAPI locks itself up.
EDIT: I retract that statement. Even after replacing the copy code with my own, the bug pops up erractically in completely random circumstaces. First it only happens on the start menu, then it only happens OFF the start menu. Then it doesn't happen at all. Then it DOES. it's completely ****ing random.
Oh, and when I paste the copy-text-of-doom to anyone on MSN, it crashes both my client and theirs.
I can crash people's MSN by pasting text into my window.