26th Jan 2012, 05:15 pm
I had ACAD MEP 2010 and updated to 2012. Everything came over just fine with CUI and stuff. My other two CAD guys are still on 2010 at the moment. When I modify the main CUI when I'm in 2012, and add buttons to Ribbon panels that were there before, they see these updates. But if I add a new ribbon tab, it's not seen in 2010.