Need to change my ad click URL. Will I lose my position?

[tomld2]

I need to add some tracking tags to my clickthrough URL's. If I edit my campaign and add a new clickthrough URL will I lose my current position or have any decrease in stats? Will my add require review?

Also I am wondering what changes to a live campaign can result in losing position or requiring review? Such as copy, title, keywords, etc. Should you ever edit a live campaign if it's going well?

[Robsp]

Anything you change to your as will trigger a review. You an either make a new ad with the correct URL and delete the other once the second ad is approved (recommended) or when the URL issue is time critical just bite the bullet, make the change and ask support to expedite the review.