Google Chrome adds some weird [B] Tags!

When I start a topic in this forum or in anyother one, I try to make my words BOLD! but when I click on the B button it adds this weird [B] tags… What should I do?
Answer #1
Well bold should be like this [b]bold word[/b]
=
bold word
so whats wrong?!
Answer #2
I dont want to see the [B] tags.
In Firefox I make the bold without seeing those tags..
Answer #3
Really? When you submit the post you’ll see the bold word normally anyway.