Sankaku Channel/

I tested it recently (a.k.a. once some time ago and again today), and on either Chan or Idol, the "[type]tagcount" thing only works if the type is "character", "copyright" or "artist" (except there's no artist tag type in Idol). It'd be really useful if it worked for all tag types.
Also, I think it'd be useful if you could add a plus or a minus to the number, to signify you want to search for posts with at least that many tags of that type (like charactertagcount:1+) or that many tags of that type or less (like charactertagcount:2-).

BTW, I really wish the idol and photo_set tag types would be added to Chan and the studio tag type would be added to Idol.