OK, here's a new one on me (see attached jpgs).  This just started yesterday - happens in parts and assemblies.  Sometimes I'll try to place a dimension and a square appears where the number should be.  If I rotate the view now you can see that the dimension looks like an extrude!  I've seen this happen with several dimensions at once - meaning that this seems to affect dimensions after they're made.  Thoughts?  (Running SW Premiun x64 2013 sp 3)