Any tools to track heap/stack corruptions?

[JN]

I am dealing with some nasty issue in my code. Basically random 
unrelated lines of code are crashing with access violations, and 
if I switch from dmd to ldc the crash goes away, or crash comes 
back, or it crashes in a different spot. Seems like I am 
corrupting some memory somewhere (I interact a lot with C 
libraries). Do you know of any tools I could use to try to narrow 
it down?

I've used Application Verifier but so far it didn't point me to 
anything specific.