Niner Jet 9 Recall

If you're riding one of the effected frames (see below for details), you should stop riding immediately:

In light of test results and after many hours of discussion on how best to serve our loyal customers, we decided to voluntarily recall Jet 9 frames with serial numbers from P8071682 to P8400454. These frames risk welding defects in the front and rear triangles that may lead to a premature failure of the frame. Unfortunately, there is no way to visually check for these weld defects. We must require that you stop riding the frame immediately because a failure could occur at any time.

More info at Niner Bikes. They seem like they are doing the right thing here.