Odd problem just started today - Images cant be displayed
 

Not done any changes on the forum but just tried to post a link for my mods to have a look at an image and all they see is a red cross (in IE)

I can see the image (opera) and on safari on the iphone. I've tried our own server and also a couple of image hosts but no joy?

Most odd problem, anyone have any ideas what could be causing this?