Running pentium quad. Two CMD windows each running an instance of program A (no window stuff just command line). Each instance processes its own set of files. Sometimes more applications cause disk to "sound" rather busy. Dropping priority doesn't help because 4 CPU's can handle the load (wanted to save disk wear). So I throttled each program A. Disks quiet down. Return priorities to normal. Turning off throttling only un-throttles the first A (lower process number). Second A consumes no CPU time! Kill second A (with CTRL-C), this is DOS style). Run second A - all back to normal. TEST: Throttle second A, Un-throttle second A. Again second A does not revive!!
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Thanks for reporting this. I will look into it and report back asap.