Forum

We're pretty new to moodle, but we experienced something similar and maybe I can give you some ideas for where to look.

In our case, problems with phantom forums were caused by incorrect data in several key tables that govern moodle's activity modules and forums.

It's a tricky data schema... honestly, I'm not thrilled with it, but I can see why they implemented it this way.  On my short list is finding (or writing) a utility to check our moodle database for referential integrity... there's just too much that can go wrong if small corruption in a db like this snowballs.

Look through the tables mdl_course_modules, mdl_course_sections, and mdl_forum, and (with some time) see if you can figure out the data structure.   Chances are, there's a problem with the sequence column of the mdl_course_sections table (for the course that's showing problems.)

-Garret Gengler
 University of Illinois
 Graduate School of Library and Info Science