Today I ran into a strange problem in VS2005. Working on a fairly large N-tier webapplication I'll had to make some adjustments on a webcontrol lib. Making sure the updates worked correct, I compiled in debug mode. No breakpoints hit, dll would have changed (message on breakpoint). Compiled again, it works fine. Havent had this problem in the past. Strange.. Well be aware this can happen! Havent figured out solid solution yet.