MyBB Community Forums

is it possible to change the message for when there's no new posts so it's not so misleading?

Unfortunately not. Every search that is made with MyBB gets a unique id in the database. This ID is used to get the information about the query that is needed to perform the search. The getnew action will also create an id, store the information into the search log table and redirects the page to that ID. From that point on, this is like any other search result and there is not way to check if it came from getnew, getdaily, etc ...