Random break in the middle of posts [NOT A BUG]

So I was playing the "Hold Your Breath Game" and I realised that when everyone does a letter constantly or the letter "x", it creates a random break in the middle. :S

Is this normal?

http://idisk.me.com/dean.majiet/Publ...815-225059.png

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Yeah it is, apparently ..^. No idea why it does it, though. But I don't think it's a bug. I *think* it might be to do with breaking it up so it doesn't stretch the postbit or something. Jamesy might know though!