on firefox, there is a strange black box that is showing sporadicly on rollover, see here:
https://www.dropbox.com/s/psc9f4r02ofyt9m/black-box.mov?dl=0
I think it is the product mask or something, that I am pretty sure I hid a while ago, but on firefox and I think IE – you see it… very strange.
thanks for your help