Upgrading a 5.0.1 installation to the latest build (5.0.2) went without issues, no errors. but all the instances through-out the site had blank interfaces. No folders, files, shortcuts. The top menu was present (Files, Tools, Admin), but no content. I checked the main config and all where pointed to the rigt collection. After refreshing the bowsers (FF, IE), there was still no content. I recycled the AppPool on the server, checked the Eventlog and still nothing.
I ended up restoring (DB, files) from back-up. Any insight? Anyone else experience this?