Hi,
I can confirm this issue. When I create a new diagram, I go through the wizard, I see the diagram editor being displayed, but the wizard never ends. If I try to close the wizard window, I get a notification stating that some action is still running and I must kill Eclipse.
The problem seems to be related to Graphiti. I installed Graphiti examples and, when I run any of the examples, almost everything in Eclipse becomes locked and the Graphiti editor does not respond.
Hence we have to wait for an upstream fix. As far as I could check this problem only occurs in Linux environments as already mentioned above.
Thanks