I’m currently trying to do assignUVs() on an MFnMesh which was created by .createInPlace() before, but this is causing all sorts of problems.

Trying to do the same assignUVs() on a freshly made mesh ( using MFnMesh.create() using the exact same data that was passed to createInPlace() ), it works just fine. ( the Parameters passed to assignUVs are not the problem, i double-triple-quadruple checked that )

Are there any special things i should be looking out for here ? Or is .createInPlace() just broken ?

This is on Maya 2009 with SP1.

Has the same problem on Maya 2008 and 2010. Drives me crazy.