However, I've noticed a disparity. Sometimes, broken images appear on my website as... well, a broken image. You know, a square, with a red X or a ripped image inside of it (depending on your browser). This is how it appears to me. However, some other users are not getting the broken images, instead they are simply getting the text "[IMG]", it leaves them confused.
Why does it do this? I would rather my users get a broken image, instead of an empty IMG tag; the broken image tells them something went wrong. An empty IMG tag tells them nothing; instead they think my website is broken... they should be thinking twitpic is broken.