Aveirah, I don�t think I ever heard that Rebbe talk about R� Yoshe Ber, so I can�t really answer your question. I definitely remember him saying some very negative things about RAY.
I also remember hearing that RAY used to daven Mincha b�yichidus somewhat often, instead of davening with the yeshiva. Someone told me he heard another Rav say �If RAY would daven b�rabim and say lashon hara b�yichidus, instead of the other way around, he�d be much better off!�
