Symptoms

When you go to "RSS Feed" configuration page for Document, Picture Library, List etc. and go back to SharePoint Dashboard using link at the top pointing to "RSS FEED for ..." and then click any option on the ribbon, you got "500 Internal Server Error" and ribbon stops working. When you use built-in browser button "go back" instead, everything works Ok.

Impact

Ribbon stop working.

Conditions

"500 Internal Server Error" occurred. Ribbon stop working.

Workaround

Use built-in browser "go back" button instead.

Fix Information

Returning to main menu from "RSS FEED for ...", ribbon continue to work. No more "500 Internal Server Error".

Behavior Change