Ceiling fan looks like a herd of elephants ran over it

Hmm... that seems to be a result of using one of those low-priced dumped imported ceiling fans
But seriously, it seems that some vertices get messed up. Since all objects are batched to a single mesh, the rotation of the ceiling fan is done by manipulating the vertex buffer directly. Looks like there may be some kind of imprecision over time. We will look into this issue.