[mdr-users] MDR and Swing

I am working on a small utility that displays and MDR model in a JTree. 
In generally I face a lot of execution "freezing" issues and I often 
have to call SwingUtilities.invokeLater() to prevent execution from 
freezing where MDR is involved. Does anyone else have similar (bad) 
experience (and hopefully come up with a solution) with MDR and JTree 
(or Swing in general)?

Cheers,
Dimitrios

P.S. I use Eclipse for Java development in case that makes a difference.