i'm using prototype.js <http://prototype.conio.net/> and builds after r13387 break it's 'Insertion' class (which inserts html before, after, or at the top or bottom of page element), specifically this line of (js) code:
createContextualFragment returns as undefined, instead of adding the content string into the dom. i tried r13442 and it was still broken, so i've rolled back to r13387 where it works fine (as it does in ff, too). hope this helps, contact me if you need any other info. thanks for such a great browser!!
If this is true, this is likely related to my recent DeprecatedString->String changes in that area.