A new call control bar floats above any other windows while calls are in progress, so it isn't necessary to bring the Skype application to the front to mute or end calls.
Phone numbers from the Mac OS X Address Book are optionally accessible within Skype 5.0.
Other new features include searching across multiple chats, and the ability to quickly rejoin a call after an Internet drop-out.
The application's user interface has been redesigned to use a single and comparatively bulky window. The default text size is much larger than in that used in Skype 2.8, and size adjustments only apply to message text, not to contact and conversation names.
And there's more to be unhappy about - see page 2.