The top search bar defaults to different types of search depending on the page one is on. It would be helpful to make this configurable to allow for local preference. For example, when one is looking at a Normal view of a bib record (/cgi-bin/koha/catalogue/detail.pl?biblionumber=X), the top search bar defaults to Search the Catalog. But if one clicks to Holds on the same record (/cgi-bin/koha/reserve/request.pl?biblionumber=X), then the top search bar switches to Check Out. Our staff find this disruptive, but I don't expect a strong consensus across the community for how this should behave.
+1 Something as simple as the default expectation that the primary search from the main search bar from the home page doesn't fit all libraries. Special/research libraries often perform more 'search catalog' searches than doing a checkout search, so they are either always selecting the correct search tab, or we jquery a fix for that, which is prone to breaking at upgrades.