What fixed it for me was removing the ‘@’ symbol from the admin/wp25/album.php (Line 115).
So from this:
jQuery('input[@name=sortorder]').val(serial.hash);
to this:
jQuery('input[name=sortorder]').val(serial.hash);
It appears in a few other files, so if you have something like Notepad++, do the ‘Find in Files’ and just get rid of that ‘@’ symbol – the new JQuery doesn’t like it.