[ Ben Rimmington]Ben RimmingtonAnonymous 17 Apr 2012 04:42
JollyRover v1.20 (available 16 April 2012 on the Mac App Store) fixes the problem.
[Verified using Lion v10.7.3]
According to the release notes, you should delete the "~/Library/Saved Application State/com.brawsome.jollyrover.savedState" folder (if it was created by a previous version of JollyRover).