When using quick "Search this forum..." or quick "Search this topic...", the URL of the search results page does not contain the parameter "keywords=". (also counts for using quick forum search that can be found in the header of a vanilla php3 board)

Further, when searching inside search results, the URL of the search results page only contains the parameter "keywords=" with the previous keyword(s), so without the latest added keyword(s).

However, when the search results consist of more than 1 page and you go to the next page, then the URL contains the parameter "keywords=" with ALL keyword(s).