Comment 4 for bug 80520

I found a "workaround" (if it can be called that way) by deleting the ~/.azureus directory, azureus starts normally. when you backup config files, you shouldn't even loose your settings. unfortunately this solves the problem just until next "unexpected error" ocurrs.
I am also using wifi, but it appeared once even when I was connected wired, so I suppose this has nothing to do with that.

azureus 2.5.0.0, Java 1.6.0_01 Sun Microsystems Inc. SWT v3235, gtk Linux v2.6.17-11-generic, i386, ubuntu (not very up-to-date)