Yeah, I'm hoping it was just a defective pair but I can see how the design could fail as a result of a jarring impact. While it can be difficult to open the hatches for adjustment, torquing the heelhoop opens a gap that might cause them to pop open under the right conditions. Perhaps I should have opted for a pair of SF45's in exchange. I notice they didn't put the hatches on the SF45's. Does anyone know if Flux is changing the design on the TT30's for 2012?