hewahoo margins strangeness

Hi
I have used hewahoo for almost a year on a site very successfully, but this morning deleted the theme, and reinstalled the latest version available (downoladed from your site this morning). I have replaced the logo image, background image, etc with the ones used before, and changed the dimesnions back to what I was using previously (see image attached).
However, when I view the site (ffox and ie) there is large (100ish px?) gap between the mainbody/component area and the right hand modules (all in 'right_two') It appears on all pages, and I can't work out how to reduce it - help please!