Hi Ditto - re: flickering on spheres, I haven't seen anything like that over here so far.

Can you please post a 3DM model file for a simple case where it is happening for you just so I can make sure I can have the same test case over here for looking at?

Also do you have any custom settings set under Options > View > Meshing parameters - are your settings there the default Mesh angle = 10 degrees and "Add detail to inflections" enabled?

- Michael