I have a problem where I get this error when visiting my site running on a local intranet server. I've tried visiting the site from a IE7 and IE8 browser and the weird thing is that the site shows up as it should for a second and then it looks like the browser can't see the stylesheet anymore which makes the site look like pure HTML.
Error screenshot: http://www.pixel-factory.dk/error1.png
Stylesheet suddenly missing: http://www.pixel-factory.dk/error2.png
‘currentStyle.ie7-height’ is null
Any idea what to do?