On starting Vuze from the command line (with no ~/.azureus directory and no Vuze files in /tmp) a segmentation fault occurs in libxul. This has been seen with Vuze 220.127.116.11, 18.104.22.168 and 22.214.171.124. It does not happen with Vuze 126.96.36.199.
The OS is Slackware 13.0 32-bit, Firefox is 3.5.3.
The fault happened with both jre-6u16 and jre-6u18.
swt.jar in Vuze 188.8.131.52 is version 3.550. It was experimentally replaced with 3.631 but the fault remained (with less error reporting).
The attached error log was generated by running Vuze 184.108.40.206 with its standard swt.jar (version 3.550) and jre-6u18.