Hi, I still have GTK+3 running but now in VM. My notebook is back using a clean install of F22 MATE GTK+2 with my usual preferences set and running like clockwork
Going back to the main point I am posting - I have found in GTK+3 that if I make the panels transparent, then the applets start crashing. Do you want the problem report output for the crashes Wolfgang or were you already aware of this?
Also, a very minor observation. The Blue-Submarine GTK+3 version has big chunky dimpled handles for applets. I prefer the more minimal GTK+2 style for Blue-Submarine theme. Is there any way to bring those back? Other than that, so far it is working well. I did experience the terminal issue noted above but just reset and cleared it when it happened (tweak now applied).
Finally, what is the likelihood of mint-menu being ported to GTK+3. Is that your domain or should I ask the mint-menu team on github?
Edit - reported the issues on the github page. What about compiz-emerald crashes? where do they need reporting?