You need to enroll in the beta in order to report bugs.
I'd encourage you to check the public web site http://office.microsoft.com/
often for any news regarding how to enroll in any future public test release
of a future version of Office.

Signature
Echo [MS PPT MVP]
http://www.echosvoice.com
Fixing PowerPoint Annoyances
http://www.oreilly.com/catalog/powerpointannoy/
> Received Office12 Beta1 due to PDC but cannot report this through betasite
> because we were not officially enrolled in the beta.
[quoted text clipped - 11 lines]
>
> http://www.microsoft.com/office/community/en-us/default.mspx?mid=e32320d9-8bc6-4
d8b-8f44-e09057bada18&dg=microsoft.public.powerpoint