I installed Azureus today, using apt-get. There were a few problems with it: 1) The Tray Icon at the bottom is a white blank space 2) There is no X button to close tabs. 3) If there is an improper shutdown, the warning message will not go, as the "Hide" button does not respond.
These problems are verified by other users on ubuntuforums. There are 2 ways of solving this: 1) Use Automatix to install azureus 2) Download the package from azureus.sf.net and extract and use it mannually.
And remember to remove the apt-getted version first.