You're missing a /div mark.
Looking at the source code for your home page of http://karmillina.wordpress.com/
Do a text search within the sourcecode for the text 'sidebar'. There's only one hit.
Right above it is two /div marks. Needs to be three. I add it here on a local copy of the page and it works fine. Still want to know what's up with that smiley face though. :)
One of the great things of Netscape Composer that I like is you get a graphic of the html marks. You can click on it and it'll show you what part of the page is covered by that mark.
Of course now, you have to figure out where in the theme the missing /div mark goes. How did you get a non standard theme anyway?
Hope this helps,