Found it in one of Mike's FAQ post
###Bug Submission
If you think you may have found a new bug:
1. Go to the Autodesk website: http://www.autodesk.com
2. Click on "Contact Us".
3. Click on "Feedback" in the left hand menu.
4. Click on "Products" in the left hand menu.
5. Click on Submit a bug report
5. Now you show see the "Bug Report Submission" web page.
6. Read the instructions, fill out the form, and press the "Submit Bug
Report" button
Or directly go to the Bug Report Submission" web page:
http://usa.autodesk.com/adsk/item/0,,1073063-123112,00.html
More bug report info from Autodesk:
"You can also either report it through your reseller or call Autodesk's
Safety Net support number at 800-225-6531. If it is determined that what you
are calling about is a defect you will not be charged for the Safety Net
call."