I just found out that all 4 of my rims are warped. I phoned the head office Lexus and argued my point. After a week of investigation, they have approved to exchange all 4 rims under warranty. Give it a try.
Just be careful with the roof open half way, it will not stay there for long. After a while it starts folding on it's own. If your arm or finger is in the mechanism, it can hurt you.