I used PTU 3.1 on a specific application reliably a souple of months ago. Now with the same application, PTU crashes everytime while performing a basic statistical callgraph with the default settings - hotspot analysis, time-based sampling etc. The debugger tells me the following:
Unhandled exception at 0x78144a51 (msvcr80.dll) in ismimp.exe: 0xC0000005: Access violation reading location 0x00000000.
Let me know if there is any other information that I can provide. This is a great tool and I'd like to get it working again.