How did they change the encoding? And how did you change it back? I’m having a similar problem since upgrading to 2.5.1 when trying to edit or write posts. When I open a draft post (any one) Firebug shows an error over and over with jquery. Eventually it gets in the thousands and my host cuts me off for overloading their cpu.
I’ve tried re-upgrading 2.5.1 and downgrading to 2.5 by restoring backups, but to no avail. I’ve deactivated all plugins. The problem shows in IE, Safari and Firefox on both of my Windows XP Pro computers.
Any help would be appreciated!