IN CASE NOTHING ELSE WORKS:
Or an awful solution could be if you use the "name" property of the browser object and -> if firefox -> reposition texts.
It even hurt writing this all down
Haha, that would be madness.
Uninstalled both browsers using Revo uninstaller, reinstalled them, still nothing. Tried Rex's Tag Text plugin, same issue. With that, I have yet another problem: it only positions correctly horizontally if I use left alignment, or if I use Firefox, where it works fine. There's something funny going on on my computer...