[SOLVED] Css rows offsetting to the right.

http://it-teacher.co.uk/armine/

Anyone got any idea what I'm doing wrong here? Whichever order I put the three rows containing the slider, blue widgets and green widgets, the second two are offset to the right.

I've tried moving the slider to the bottom - same thing happens. Green widgets row and slider row offset to the right by around 20px.

I've tried adding a cf.

What am I doing wrong? Obviously something, but what??