I think you could perform a quick search in Rippetoe's forum and read a fair deal about it. Basically, strength imbalances happen, but will become less noticeable in a relative sense the stronger you get. If your right arm can move 5-10 more pounds than your left, that's a fairly large difference for someone pressing under 100 lbs, but for someone pressing 200lbs, it's not that big of a deal.
Edit: Of course, what you need to remember is that if you can't complete the exercise with acceptable form, you're using too much weight.