Curious difference in behavior

[Todd Blanchard]

I'm going back and forth between a Mac using the Unix VM and a PC  
using the windows one quite a lot with the same image.

I recently coded myself an infinite loop by accident and found that  
the Windows VM has no trouble interrupting the execution and bringing  
up a debugger to find the problem (using alt period) but the Unix  
one, while it opens debugger windows when holding down cmd period,  
still remains frozen and I have to quit the VM.

Does anyone know why this is different and, more importantly, how we  
might fix it?