There's been a few problems with SEF that we've worked hard to resolve.   In the end, we've added a configuration field that you can manually edit the appropropriate link... if the script doesn't or can't figure it out correctly.  Once manually configured, the remaining issues seem to have been solved.

The server_script_url configuration setting is available in version jPFChat v1.0.4.  It's still being tested... so if you have a need... ask us for it!