Win 7 x64
Broken in 1103abd (Gooseberry branch)
Short description of error
Having a laplacian smooth modifier on an object severely slows down armature movement even if the object itself has its visibility turned off. Makes working with armatures affecting multiple objects incredibly tedious.
Exact steps for others to reproduce the error
Add armature to an object, add laplacian smooth modifier, turn off object, adjust armature.