My XLR was delivered 1/22/04 and has 5600 miles on it, the first problem was with the top. The top would not open all the way. It would get stuck . This took 3 trips to the dealer but was repaired and no problem since. There is a paint flaw on the trunk (looks like something is under the paint) the dealer is going to repaint the trunk Tuesday. The last thing that has just started happening but has not been taken to the dealer is the cruise control will cut off and and a message says to clean lense cover when the lense is not dirty.. All these are minor and have been taken care.
On the cruise control issue - that has been known to be caused by the radar not being aligned properly. Obviously there can be other things that could cause the message but the most common is that the radar needs to be properly pointed by the dealer. It is a fairly easy repair once the dealer has the alignment tool.