I recently encountered an issue: when entering our Search center logged in as a user with alternate language set, I receive the following error message:
"Literal content (' ') is not allowed within a 'System.Web.UI.UpdatePanelTriggerCollection'".
When logged in as admin (default language) the Search Center works just fine.
The error message indicates that there are a misplaced " " somewhere in the code; but I've no idea where that would be, as far as I know sharepoint uses the same files for both default and alternate languages.
Any suggestions?
EDIT: Seems like the alternate language has nothing to do with it, the problem occurs for all users who are not admin or owner. Still no clue; if there were anything wrong in the code, would it not affect admins and owners as well?