Create and enable an exception breakpoint.
Have an application that throwns that exception in some of it's methods, but does not catch it.
Let the exception breakpoint be hit.
Pop from the current stack frame and let the application to continue - the exception is going to be thrown again.
ERROR: The exception breakpoint is not hit and the application terminates.

For the original problem see http://www.netbeans.org/issues/show_bug.cgi?id=145676

Please see the attached testcase.