UI Tabs - Mismatching fragment identifier?

UI Tabs - Mismatching fragment identifier?


What is this error meant to signify? There have been a few threads
about this, but they contained nothing conclusive. The error seems to
only be thrown by the switchTab() method, but it doesn't even appear
that my tabs are initing properly - classes are applied, but the
content of all the tabs is visible. I've got tabs 1.6rc2 running
great on one site, yet on this one (it's Drupal, granted), I can't
seem to get it going. Any insight on this error and what it is
indicative of?
Descriptive exceptions are great, except when there's no documentation
of what they actually mean...