Warning: Do not mix Beta and RTM!
With the Office 2007 RTM build being available soon, Microsoft is releasing related RTM downloads already. For example, the RTM Compatibility Pack is now available, and I wouldn’t be surprised if the RTM PDF/XPS add-in will be available soon.
If you have a Beta version of Office 2007 installed, do NOT install anything related to Office 2007 in its RTM version.
The Beta and RTM builds don’t play together nicely on the same computer. For example, if you install the RTM Compatibility Pack on a computer with Office 2007 B2TR, Office 2007 B2TR will become unusable. To restore Office 2007 B2TR to full functionality, you need to remove the RTM Compatibility Pack and run a repair of Office 2007.
If you want to install anything RTM related, then you have to uninstall all Office 2007 Beta software first! Therefore, don’t install anything RTM unless you are ready to make a full switch to Office 2007 RTM.
Edit: If you are looking for the B2TR Compatibility Pack, it can still be downloaded from Microsoft. I don’t know though how much longer it will be available.

November 13th, 2006 at 4:21
[…] Important: With RTM downloads now available, do NOT mix Beta and RTM! […]
November 14th, 2006 at 11:24
Patrick,
Thanks. Of course i did not save the ISO image of the office 2007 beta. Is it available anywhere? If not now, when?
Thank you.
November 14th, 2006 at 11:27
Norman,
the beta is over. You cannot download it anymore. Trial RTM versions will be available December 1.
November 14th, 2006 at 11:31
Thanks.
I did make the mistake of liking office 2007 so well as to create documents which i cannot now retrive.
Thanks for your assistance.
November 14th, 2006 at 12:10
Norman,
luckily you still can download the B2TR Compatibility Pack: http://www.microsoft.com/office/preview/beta/converter.mspx
I edited the post to include the link
November 22nd, 2006 at 16:28
Yes, it’s very important.
Unfortunately, I have found this notice too late, after I installed Office 2007 RTM Compatibility Pack over Office 2007 B2TR. After that, all my Office 2007 applications become completely unusable. Office Diagnostics did nothing. I tried to uninstall RTM Compatibility Pack, Office still didn’t work. Only repairing with Office setup helps me (I suppose, Office was not completely restored, but it’s not so essential now). I will replace B2TR to RTM Office 2007 when it becomes available.
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Patrick, could you pay attention on the problem in the setup of Office 2007 Compatibility Pack? I think it has to check the version of Office 2007 already installed on the computer. In that case setup would be able to warn user and decline the installation which can crush the Office. In addition to the problem with B2TR (it will go to past soon) current behaviour could be potentially dangerous to the post-RTM versions of Office 2007.
December 19th, 2006 at 16:11
but how to fix it?
http://groups-beta.google.com/group/microsoft.public.office.setup/browse_thread/thread/b8ba1585cd81d5b4/728603bda4bb4c23#728603bda4bb4c23