[_ck_]

Okay I’ve figured out why it happens.

It’s a very serious flaw in how the new 1.0 db caching system works. Apparently they now suddenly base everything about the WHERE clause. If the clause is slightly different for any two queries, it doesn’t use the cache and instead does it a direct db query. It’s stupid.

There is absolutely no way I can fix it in the plugin, it has to be fixed inside bbPress 1.0 and I am not sure if or when they will bother.