I was away from my laptop for a few days because of a family emergency and when I came back to the site my problems had gone - everything seems to look and work fine. I use IE9 which loads in IE9 compatability mode which I thought was the problem. I have checked what is different my end and I am convinced it is that the document mode used to load up as IE7, now checking in the tools menu under F12 developer tools I found it is now defaulted to IE9 and everthing seems to work fine. Hope that helps someone.