I want to say that there was some engine issue as well.... I can't remember what. Either way, I'm strippin mine down to stuff a cbr600efi in it. Should be a good ride around next fall...
The 06's had some crank trouble...along with some select 05's. I had about a billion hours on mine before I did a complete on the motor and frame. I never had problems with the frame cracking but gusseted it anyway.
Pics of my 04 from last year about this time...