Along with latest version of Virtuemart 3 we released DJ VM Page Break extension to work with that version.
We've just updated DJ-VMPageBreak extension.
Editor plugin (ver. 1.3) not works smooth with latest VirtueMart version. In the previous version the Add Tab button appeared in latest VirtueMart version only after product was saved - now it's fixed.
Also the Content Plugin (ver. 1.1) was updated with new option to attach default css.