We're on E2K3 and today someone pointed out that using OWA and IE8, if you right-click and "Save As" on an attachment saved in Office 2007/2010 format it defaults to saving as a .ZIP file. I've ...
Is it a frontend/backend setup or only backend? I've seen this if the frontend is using different versions of certain OWA files or Exchange DLLs than the backend is.