I never use IE and installed it only yesterday just to check how is my site looking, only to find out that my blog looks like a pile of crap.

Help, please!

It doesn't look much better in Safari and even firefox has it's issues. 3 browsers, three different looks.

Looking at the source, it looks like you have style sheets imbedded in the posts and other issues.

Disable all your plugins and take a look. then add them in one at a time and see if they are causing the issues.

Funny, I use Chrome and Firefox and everything looks perfectly OK.
I'll see what comes out of plugins.

It was Display Widgets plugin, thanks a lot juggledad!

I checked with Display Widget author and she advised me to check if widget works with other themes and it really works, so it is a conflict between Atahualpa and DW, not DW error.
Too bad for this is the most wonderful widget plugin :/

Well, same goes for other widget plugins. My problem is not resolved, don't know what to do, styling widgets messes up my sidebars and center content completely.

EDIT:

Further investigation reveals that when I have an empty left sidebar page shows as it should be.