Kathleen has posted about a real nasty bug in the VB 9 (VB 2008) compiler. And I mean nasty !!
The compiler won't warn you, won't give an error of any sort.. it will just omit lines of code from your application ! Yep, it will compile as if nothing is wrong, yet it will remove your code !! If you're lucky, your test scenarios will pick up on this, otherwise expect the unexpected .
It'd be nice if the VB team would post about this and let us all know the exact scale of the problem and when a fix will be available.