Thanks. Well that does sound a bit scary. Is it actually changing the data? What bothers me is that perhaps I would not be able to identify right away if there had been a problem with the conversion. (For example, I might visit our Japanese forum in two weeks and realize that half the posts are gibberish, or something like that).
I do want to prevent the error from happening though at the very least. Perhaps there is a Javascript solution that would just trim out any added emoji characters when they are typed in.