[BexxBl]

okay i found a solutuion.

since my theme has theme options i just needed to disable the login/register popups under gerneral.

[BexxBl]

It was a problem with s2 member. they not so kindly checked a box in the restriction options that disabled the display of feeds, posts and some other things for not logged in users. it took me ages to find the problem. but thanks for your help anyway

[BexxBl]

I achieved it with buying the Pro Version of WC Vendors and a Customization of the BP WC vendors plugin