FlexUnit 4.1 RC1 - adl.exe hangs and is not killed when timeout exceeded

I am running AIR based tests using FlexUnit 4.1 RC1.

I have the "timeout" parameter of the FlexUnit Ant task set to 45 minutes (2700000 milliseconds).  I expect that if this threshold is exceeded, the runner should be killed and the ant task will exit. I am not seeing this behavior.  The adl.exe task continues to run, even though the timeout has been exceeded.

Is this a known issue?

Thanks,

Trevor