Firefox Themes causing out of position pixels

That Web Guy had a problem with a design not being pixel perfect – only it turned out to be down to the theme he was using in Firefox. Bug?

Site plug: JohnHopkinson.com

I’ve been helping my dad out with IT while he sets up his new venture and i’m very proud to announce the new website for John Hopkinson & Co. The site is a showcase for services available and properties/land for sale. Soon we’ll be making available some papers and articles relating to chartered surveying, valuations, arbitration and inheritance tax.

From a design point of view, the site is all Strict XHTML valid and features RSS feeds and a few other nifty features.