Editing panels

Hi, I'm having trouble editing panels through the Panel Wizard. Whenever I change something I get this: Error <http://xen-xwiki.lin.idainfront.se:8080/xwiki/bin/preview/Panels/Navigation> number 4001 in 4: Error while parsing velocity page Panels.Navigation Wrapped Exception: Encountered ""Main.TagsRss"" at line 3, column 114 of Panels.Navigation Was expecting one of: "]" ... "," ... ...even though I haven't changed anything on that line. I tried editing the entire right hand menu, got pretty much the error message from above (on a different line and 'expecting' a bunch of other signs as well) and now the menu is gone from the wiki. I've tried Rollback to previous versions but it's not making any difference. I've looked at the actual source code for the panels and haven't found any difference between them and my code after I've changed back my changes. I'm using Tomcat, MySQL and Firefox What else do you need to know in order to help me? What am I missing? Regards //Karin