Something rather bazaar has just occurred with my Quicktime.

First off let me say that I have two machines. 1-Macbook Pro (Macintel) and 1-iMac G5 (Not Macintel) I trade files between the two. I just upload FCExpress to both machines and I am learning to edit with FCE.

Here is the Odd thing: Everything I edited prior to FCE would play choppy in Quicktime on my Desk top. Naturally I thought it was a memory issue and I started looking into adding more. Then I realized that a film I downloaded played just fine.(Yes I downloaded a movie, if you want to chastise me for this please do so in another thread) So I thought maybe it was something about iMovie. But this never happened before.. So I went to the laptop and again the films I edited on iMovie played choppy, now here's where it gets weirder, I burned a DVD of the short film I edited and it played just fine no choppiness.

Then I got curious and went to the project I was working on in FCExpress. It plays fine in play back while editing. So I exported it as a Quicktime movie file... and Damn it also plays choppy in Quicktime, so I waisted another DVD and burned the project and it plays fine.

My solution would be to dump Quicktime with all the plug ins and reinstall, However before I do anything drastic that will take too much time, I thought I would turn to you guys, oh wise Apple people and tell me is there a setting I have wrong? I downloaded many of the third party plug-ins, should I dump them? (The plug ins from the "third party " site as well as flip for mac)

I didn't have this issue before loading Final Cut