After installing Visio 2013 Preview I wanted to see how my VisioAutomation library handled the new version.
The good news is that it works, there aren't any fundamental compatibility problems that I see.
There is one thing you need to know: In the Visio 2013 technical preview the “Dynamic Connector” master is no longer in the Basic Shapes stencil. Instead you'll have to find that “Dynamic Connector” is in the Connectors stencil (“connec_u.vss”).
I'll be fixing my unit tests not to rely on Basic Shapes any more so moving forward to Visio 2013 should be easy.