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In previous versions the cache was removed with the userdir, now it has to be removed by hand.
It's bad. The uninstaller should remove caches if a user check the userdir for removing. Could you reproduce it again? If so, please attach your messages.log before uninstalling and then run the uninstall with a switch --verbose --output /tmp/log.txt and attach it too? Thanks
I can't reproduce the problem any more: I'll reopen this issue if it happens again.