Scrubbing through aniation slowed down.

For some reason the current blend scene I’m working on doesn’t scrub without a slow down.
I have no idea why, it’s not the scene’s complexity so I’m confused.

If you’re scrubbing from the Action Editor, the code there can get a bit sluggish with heaps of keyframes (this has been fixed for 2.5 though).

Another possibility is whether you’ve got subsurf, shaded mode, or background images turned on.

Nothing sub-surfed or anything.
I found out that the audio sync was on, I turned that off and now it works.
Thanks for taking the time to try to help though.