Redmine

According to the person who closed http://www.redmine.org/issues/8990 I have database corruption and Git path permission problems. I'm not sure either assertion is true, but there does seem to be a problem. Can someone help me resolve this?

Incidentally, will Redmine have a problem if I invoke ruby script/runner "Repository.fetch_changesets" while another invocation of that command is still running? I have that command in the post-receive hook of several of my repositories, which are often updated in quick succession.

Thanks.