Bug - deleting face causes MoI to become unresponsive

 From:  Michael Gibson
2490.7 In reply to 2490.6 
Hi Otterman, I've found out which piece is going too slowly for this delete operation and I'm working on rewriting it to see if I can make it better.

Right now you can run into this particularly if you delete a face that then leaves some disconnnected island kinds of pieces (in your case the letters) and it is being performed on an object made up of many faces.

I think you found this already, but if you select that whole sub-structure of faces (including the interior letters), and then use Edit/Separate, that should go ok and then deleting that face from a smaller object should work better at the moment.

- Michael