I've upgraded to IE10 for win7. When I login to OWA for exchange 2010, I notice I can't drag and drop emails into any folders. Compatibility mode doesn't work either. The only way for it to work is to go into developer mode and force "Document Mode" to "IE 9 standards".
How do we post bugs for the exchange team to fix? I'm sure they have to update the OWA code to fix this.