We were working on a zen subtheme for a website when we came accross a very strange issue. Internet explorer would not render the CSS files properly. It would pick some css files, but more or less the page was scrambled. Strange issue indeed, as other browsers would display the content just fine.

After some experimentation, we realised that this is happening for both drupal 5 and 6, for internet explorer 6 and 7. Tried to disable some modules, and played around with the zen configuration, all in vain...