I reinstall my OS alot, every other weekend usually, so this has become habit for me, but I thought I would point it out in case some one else runs across it.

Windows 2003 Server with Service Pack 1 has Directx 9.0, but if you try to install Power DVD 6 (or the trial) you will get an error telling you that you need to have DirectX 9.0b or higher to install this application.

The fix?

Run dxdiag, then PowerDVD installs fine. Why? Your guess is as good as mine...