Search just plain doesn't work. Clicking on it causes it to flash in and out. Holding down click allows you to type in and enter in a search term, but all other search functions-- image hash, name, tricode, time range, etc.-- are inaccessible.
I get an error when trying to specify the width and height for an image search. The function doesn't seem to work on desu either, but it does work on 4plebs. Is it just a matter of each host having to implement it themselves or something?