Help Please - Margins pushed out

I seem to have screwed with some code and now the margins are busted on these pages - E.G. [Vous devez être inscrit et connecté pour voir ce lien] The change seems to have affected all pages in the LondonLifeStyle/LifeStyleGuide.aspx?LSCatID= directory. The home page and pages like this are fine - [Vous devez être inscrit et connecté pour voir ce lien]

Any and all help welcome and thanks again four your time.</div>