Comment 1 for bug 291082

Thank you for reporting this issue.
It looks like that for some reason Azureus does not work with Java5.

Please try upgrading to a Java6 jre installing one of the following packages:
default-jre (wich will install openjdk-6-jre) or sun-java6-jre.

You can check that the correct jre is selected by running: sudo update-alternatives --config java.

(I think I'll fix this by depending on java6-runtime instead of java-runtime.)