I've tried to create a menu item linking to jdownloads, and I end up with 'The website encountered an error while retrieving . It may be down for maintenance or configured incorrectly..' (Chrome) and a blank page in Firefox.
Edited with more meaningful title
Hi
That is most stange as not been previously reported and is an everyday event.There could be many causes.First can you see you Categories and Downloads in the Backend.Also which menu item did you try to set up?
To diagnose properly I would need your site details which you can send by Private Message (Click on the whitish square with a tail near my name. Will need full backend access.Colin