GUI hangs after Ant build

Hello

I've run into an issue with IntelliJ where it hangs the GUI after doing an Ant build. I've copied the text from the Jira issue (http://jetbrains.net/jira/browse/IDEA-14955) below:

Begin
We have a project with in the region of 50 and growing modules which is being developed on OS X using IntelliJ Selena (various builds including M2) and we're seeing a problem that when the ant build completes the GUI is unresponsive for up to 2 minutes afterwards. The actual build only takes 15 seconds. We haven't been able to work out what it doing beyond sitting there hammering one of the CPU's. During the build we see both Java and IntelliJ using a lot of CPU as expected but once the Java process is complete IntelliJ continues to use the CPU and doesn't appear to be doing anything.

Is there something we can look for or at to help resolve this? I have tried 6.0.5 and builds 7051, 7087, 7-0M2 and 7274 all of which exhibit the same issue. When I put the entire project into a ram disk it was quite a bit faster but even in this case the GUI was still unresponsive after the Ant build was complete. While the ram disk solution eases the issue somewhat we are going to be adding quite a few more modules in the future and we're worried that it will continue to get worse as time goes one. Has anyone else seen this issue?
End

If anyone can shed a little light on what IntelliJ is doing at this would would be great!

thanks in advance
tim