Can't say as I've heard anything bad about that issue... If I lived in Rainy England and the rest of the U.K., I can't say as I wouldn't want to stay lit either
but seriously, there could be so many reasons for the "issues"? Lack of proper mapping after installing can's? Idle set too low? Humidity?
Mine runs incredibly... and besides.. at 107db/idle... it pisses off the neighbor