See also the Google Groups thread. If there is any information I can provide and that would help, please let me know.
May I ask you what the solution to this issue is (except reinstalling the whole application)?
Sorry, I should've explained. There isn't much information about this problem, but I guessed it was the same problem as issue #1402 , which was fixed in the new release.
Have you updated to the latest code? Is this problem still happening? Can you tell us what page, what your crawler log says, what your Apache log says, if there's any error anywhere that could help us reproduce it?