One of the definitions of general, from Dictionary.com is: 3. Not restrained or limited to a precise import; not specific; vague; indefinite; lax in signification; as, a loose and general expression. which is a pretty good description of that forum. Wordnet says: 2: not specialized or limited to one class of things; and 6: somewhat indefinite.
Miscellaneous is 1. Made up of a variety of parts or ingredients.
2. Having a variety of characteristics, abilities, or appearances.
3. Concerned with diverse subjects or aspects.
Both words fit the purpose of that forum, but imo naming it "miscellaneous" could give rise to people thinking it is a true dumping ground. And we already have enough people who want to do that at the moment.
Personally, I like the current name.