I've finally, thanks to the JetBrains guys, updated to IntelliJ IDEA 6. I am very pleased with the new features and most notably with the improved CVS support. The dialogs are much easier to use now. I also really like all the new “profiles” you can use in your project (for settings, views, and so on.) I need to spend more time with this version 6 to discover all the changes but I have ran into several problems on Mac OS X. Using the Aqua or Quaqua look and feel, the editor tabs sometimes do not appear after startup or the editor won't even show up. Nothing really serious though.