One problem related to wiper has been reported for the 2005 Jaguar XJR. The most recently reported issues are listed below.
Driver's wiper came loose in thunderstorm on interstate--wipers clashed and bent arm. Lost forward vision and was able to pull over. Had to replace arm later. In June 2012, the driver's arm came loose again and was tightened. July 14, 2012, the driver's arm again came loose during rain. Extremely dangerous in some situations.