I've not had this issue until recently. Anytime a word or phrase with an apostrophe or ampersand in the title is searched in the search box, and selected from the drop-down menu, it seems to be transcoding the apostrophe (from the usual %25 to %2527) or ampersand (from the usual %26 to %2526) , thus producing a "Bad title" error.
However, if you click on a link with an apostrophe or ampersand in the title, it works as usual. I'm not sure if something changed or where to make the change.
A search for "It's an error" shows It's An Error in the dropdown, and upon clicking on it, the following would load:
whereas previously it would correctly load: