When selecting all alerts in the alerts center and fixing the alerts in batch with the "Fix all previous alerts" option, the Alert Center dialog displays a "An error occurred processing your request." error. An inspection of the JSON response reveals:
An error occurred processing your request. Error: Unable to load /alerts/RemoveAlerts.do?org.apache.catalina.filters.CSRF_NONCE=CE764D4EBDC111884A2EF8CB89AFFDE5 status:403
This appears to be a CSRF regression bug. This would happen anywhere in Hyperic where alerts are fixed in batch with the "Fix all previous alerts" option, such as the Alerts Center, Ops Center, and Recent Alerts dashboard portlet. This does not impact the resource alert page because it does not fix alerts in json batch mode.