Something like 75% of the time I attempt to refresh from server on a project in the Force.com IDE it gets the data from the server but then hangs for 10 minutes or more on the "Saving components to project" dialog box. As this is a local operation I can't see any reason why it would be taking this long. I'm using the standalone IDE, but also had issues when using it as an eclipse plugin. OS X 10.8 (but also happened on 10.7) on a 4-month-old Macbook Pro.
