Nsight Version 3.1 Debugger bug?

I downloaded and installed Nsight Version 3.1 into Visual studio 2010. When I used the Nsight debugger, I get the following error message on an malloc statement inside the kernel:

CUDA Debugger detected HW exception on 14 wraps. …
Exception = Out of range address …

However, when I execute the kernel without the debugger, the kernel executes and generates the correct results without any exceptions…