I found an incompatibility with latest jquery masonry 3.0.0. in wordpress themes.
The Price filter slider doesn't appear, but 2 input boxes are present instead.
Woocomerce works with old version 2.1.03 of masonry, which one is sometimes bugged with posts positions alignment.
As next themes will use v 3.0.0., I suppose it would be interesting to make Woocommerce compatible with it.
If you have a solution for this, I'm ready...