Video quality when playing a movie

Hi there
my home theatre set up with mac mini (latest os, latest QT pro, 1GB ram) is pretty swell. One thing that is bugging me is that when watching DVD using front row, the player skip a few frames every 20-30 secondes. I first thought it was a Netflix crappy quality DVD thing but it's not. it's doing it regardless of the source of the DVD. old or new.
Doesn't do it when using the dvd player app.
any ideas? suggestion? setting changes?
thank you in advance.
cheers
[a]
iMac 24", MacBook, MacMini Mac OS X (10.4.8)

Okay, here goes... Log back into your main account. Drag your "Preferences" folder from this location out to the Desktop:
<Macintosh HD>/Users/<your user name>/Library/Preferences
Then log out and log back in. Of course, everything will be reset to the defaults and a brand new "Preferences" folder will be created in your user's Library folder. Make sure your DVD Player application is running smoothly. Then, you can start to drag, one, two or three at a time, your preferences from the folder on your Desktop to the new one in the Library folder.
For example, the preference file that sets your Dock items was probably not the one causing the trouble, you might move that one back in first. It's called "com.apple.dock.plist". (You might need to drag the new one to the Trash before you can drag the old one into the new Preferences folder.) Then log out and log back in and make sure things are still running smoothly. This way, you may be able to discover exactly which file was causing the trouble.
Or you can just put all your applications back in the Dock, select your Desktop picture and re-build all your preferences from scratch. Doing this will not affect the music in your iTunes or your pictures in iPhoto.
-Doug

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