Is there something wrong with the forum BBcode?

[BetcoinRakeback]

It seems that there is some kind of a glitch or bug with standard BBcode, evidenced by this thread here that I created: http://litecoinforum.org/gambling/betcoin-poker-50-140-rakeback-(here-only)-acr-wpn-tourneys/msg10662/#msg10662

As you can see it somehow made some fonts super super small, when I never initiated that.  Anyone know why?