Quick and most likely a very easy question for most of you.

A while ago I had to get the trackpad replaced on my MacBook Pro. I got it back a few days later exactly the same (except a functioning trackpad) but one thing was different, my command F shortcut opens up Finder rather than search whatever application I'm in. I didn't think much of it but it's starting to annoy me now and I don't know how to fix it. Suggestions please? Thanks!

JFTR: I realize I spelled 'its' wrong in the subject.