I've just installed the ST3 Beta on my macbook running 10.7.5.
When I first open the app, I get 3 ST icons appear in my dock. One is obviously the original, while the other two only give an "application not responding" option when I access their context menu.
As I edit and *save* files, new "not responding" icons continue to appear.
When this happens I get a "spindump" notification in the system.log file, which says:
"Saved spin report for Sublime Text version Build 3006 (3006) to ......."
I've attached the content of that file