There was an issue with tooltips not displaying obejct information if RD is loaded. I don't remember anything about not being able to import jp2 files. One thing I do remember though is that JP2 import could bail out if there is no geo-reference on the file. Do you have Raster Object Enabler installed for 2011? http://usa.autodesk.com/getdoc/id=DL15201709
Almas Suljevic Product Support Specialist Autodesk Global Subscription and Support Autodesk, Inc. Please click on "Accept as Solution" if post helped you resolve the issue.