MacBook Pro Graphics Card - Supported?

MacBook Pro 15" 2.2 GHz 10.6.1
iMovie HD 6.0.3
Canon ZR950

I'm an experienced Mac user but new to video.

When I launch iMovie HD I get a message that says

"Your computer contains a graphics card which may not support iMovie."

And then some more text referring to a Quartz Extreme Compatible graphics card if I want to do Themes, Ken Burns Photos and Video FX

I Click OK and am able to import the video from my Canon.

Is this something that I should worry about, or is it merely a note that I should buy a new MacBook Pro.

I have no interest in becoming a video expert - but I am always concerned about these types of messages.

Thank you