gitweb stops working sometimes

Hi,

I'm running gitweb on a centos 5.3 server and it works well 99% of the
time. Sometimes, I see the following behavior:
1. I'm able to load the page that shows all git trees.
2. When I click on one of the links that should show a specific tree,
it opens a page with the following text: "<div
class="title">&nbsp;</div>
"

If I restart httpd, it doesn't help. The only solution that I found so
far is to reboot the server and then everything works. However,
rebooting the server is a bad solution.

Any idea?

Thanks,
Erez