No problems here!
I always use Testors Dull Coat over my builds(both on enamel & acrylic) and have never had a problem.
The only thing I must mention is, be very careful when getting to the bottom of the can, you can get "spits" of the dull coming out and winding up on a model.
I use about 3/4 of the can and toss it. I would rather waste a bit of the can than ruin an almost complete build with spots on the surface.