Continued operation of Jenkins creates multiple copies of "winstone.jar" with a numeric suffix in TEMP folder (winstone12343543634634.jar). We had about 800Gb of these accumulated, slowing down the host system.
We are currently running Jenkins directly (`java -jar jenkins.jar`) via Windows scheduled task.
This is a serious problem. I just discovered that my Jenkins installation, which I don't even use, has been filling my drive with these files for at least 2 months, taking up several hundred GB of space. This is on Mac OS X 10.9.