We had the same issue as well. Opened a ticket with support and got a reply back that for tablets, it's a crapshoot. We have Dell Venues with that same issue and we know that it doesn't work on Surfaces (https://kc.mcafee.com/corporate/index?page=content&id=KB79624). The only tablets that we were able to get the OSK and odd screen sizing issue resolved were the Samsung Slate 7 tablets. Everything else is not working properly. The PBA is resized to a much smaller dimensions instead of filling the screen space or the OSK doesn't function.