I've noticed that after I installed the Gantt plugin (I'm using vesion 1.0.1 on Idea build 2253) my Global Code Style Dialog ceases to function.
The dialog opens but just has a message saying "Loading page. Please Wait". Normally, this would only display for a second or two before the page appears, but when the Gantt plugin is installed the message stays there indefinately and the code style page never displays (though I am able to Cancel).
After uninstalling the Gantt plugin, the Code Style dialog worked perfectly. Re-installing the plugin causes the problem to reappear.
I wondered if anyone else had noticed this behaviour. The plugin itself looks quite promising and I'll watch its development with interest.