Hi,
When I try to add an event to a calendar list (have tried creating multiple calendar lists, all have the same issue - no changes made at all to defaults) I get an intermittent error -Updates are currently disallowed on GET requests. To allow updates on a
GET, set the 'AllowUnsafeUpdates' property on SPWeb.
Running IE9 in compat mode, IE8 standards (tried downgrading to IE8, same issue). SharePoint was installed with SP1 and had this problem - now has SP2, issue persists.
Any assistance appreciated.