Grouped list views don’t expand items are missing in document library for SharePoint 2010 after SP1 install
After installing SP1 and modify a view as grouped view you may have noticed that grouped list views don’t expand and under the group,items are missing.To verify this error you have to open your page in SharePoint server’s browser. Becuase by default if you brows a sharepoint page in SharePoint server the debug js has been shown and you can see fallowing error.The problem has happening for other language except English.
Message: ‘g_ExpGroupXSLTQueue’ is undefined
For resolving this problem you may upgrade your SharePoint with minimum patch level of August CU 2011 or latest installing latest cumulative update.