Background: We have been attacked by spammers, and have now updated to 7.1 beta4. Need to delete a thousand-ish users.
Went to Control Panel -> Member Management -> Advanced search.
Tried to combine "Registered", "Member Post Count" and "Last Online".
"Member Post Count" ("less than 2") was ignored in this search. Accidentially deleted 1995 members. Had recent backup. Yay.
Tried to combine "Member Post Count" with "Registered" only; same result. Also with "Last Online" only.
Please look into this, as I would very much like to use the "Member Post Count"!