Could you perhaps explain what you did? Quoting removes code at the moment, so no one (besides Mahz) can really see what you did there. But yes, hider title content ought not to affect how the hider functions. 

[hider=I\'m testing a related thing]Did I find something more?[/hider] Edit: Apparently, adding the typical escape-character before the apostrophe will not prevent the header title from collapsing. (It was how functional apostrophed hiders could be done on the old RPG, amongst other things.) In fact, the escape character doesn't appear to do anything; it's visible.