@Mutoh: Thanks, but unfortunately it didn't help. Perhaps it didn't clear the cache; I should try a different connection (there are some crazy issues about mine because it is shared with a few hundred other users via a proxy...)
@zax: Thank you too; a new browser (tried old FF and IE now as well as a new Chrome, which was the first one I thought of) couldn't load those things either

@qwerty: That answer is no, true

They appear every *insert number here* seconds, no matter what you do, but if you have more lives, the level time gets shorter (fireball comes earlier), so you might find less letters because of this.