Debugging in release mode pretty much requires debugging the assembly. This is actually pretty easy on PowerPC, and absolute hell on x86. Note that optimizations can be disabled on a per-function basis; if your compile times aren't too punishing, this can be a useful way to drill down to the bug without getting your hands dirty with LEA and JNZ.

>>A heisenbug is a bug which disapears when you try to debug it.

Is that what theyre called, they are a major PITA, luckily I seldom run into them.

To the OP u should be doing a release build every 10 or so compiles, so these errors dont start building up.