Post and comment formatting

Plain text is fine for adding spacing between

lines. But if you add a URL then [www.google.com]

[www.google.com] this happens, even if you press enter between the lines

http://niceme.me/ Preview will still show the spacing there, but when you submit the post, http://niceme.me/ it will not

be there for you, http://niceme.me/

http://niceme.me/ Does the site somehow remove spacing with URLs? Is there a way to get around this issue? Do i look like a huge dummy right now?