The customers that have reported these cracks tend to be taller and/or heavier than average and ride their tikitTM a lot.
Bike Friday co-founder Alan Scholz has been riding his early 2007 tikitTM daily for commuting, as well as long (80+mile) tours through the mountains with 50mph descents, such as on Cycle Oregon last year. We destruction test our bikes, but also ride the *!@#* out of them ourselv