Access Denied, Not a Site Collection Admin, and Cannot Create New Items

Scenario

• You are a Site Collection Admin and Farm Admin for a SharePoint Farm
• Someone has recently backed up a site collection using Stsadm which includes a site collection lock (SP2 supposedly does this automatically)

Issue

• Attempt to edit the Site Collection Admins from Site Settings results in the following
• Error:  You need to be a site collection administrator to set this property
• Attempt to load a page which does any advanced processing
• Access Denied

Resolution

• The Site Collection was Locked (Read-only).  Unlock it via Central Admin (_admin/sitequota.aspx)
• Set to Not locked