This happens in guides as well, notoriously to links. I'm not sure why the BBCode parser is screwing up so hard, but a fix would be great.
I will notify them, thanks for giving such a detailed explanation! :)

Thanks to GrandMasterD for my sig!
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Whenever I use any of the [b][/b], [i][/i] or [u][/u] comands, the text right before the Bolded/Italic/Underlined text gets stuck to the bolded text. This only happens if the text is under a picture it seems (for some reason)
For example, if I write: ''Hi, my name is [i]DarkPercy[/i]'' it gives: ''Hi, my name is DarkPercy''
However if I write it under any picture like this:
[img=http://oi45.tinypic.com/s477uq.jpg]
[...] '' Bot lane does [i]oh so incredibly well again[/i]. '' [...]
It gives:
Bot lane does oh so incredibly well again.
For some reason the ''does'' gets stuck to the ''oh''. No matter how many spaces I put between the ''Does'' and ''oh'', they still get stuck together. However, it can be fixed by putting a space AFTER the [i] command. So this:
[img=http://oi45.tinypic.com/s477uq.jpg]
Bot lane does [i] oh so incredibly well again[/i].
Gives this:
Bot lane does oh so incredibly well again.
Since it's easy to fix I wouldn't call it a very important bug but if you don't know that you have to put the space AFTER the [i], your words get stuck together whenever you use italics or bold text or underlines, which can get annoying.
I hope this was clear lol.
EDIT: Oh and something else,