Deployed on the intranet MW does not loads the CSS of Vector skin at the opening through IE. In all other browsers: Chrome, Opera, Firefox - everything works well. Interestingly, if the debugger install IE UserAgent as Chrome, for example, everything will work fine. So far as I understand, the problem with the definition of what CSS is necessary to give any version of IE. I do not see any errors in the debugger of IE. Wikimedia sites will open in IE fine, but my wiki at the same time showing me the plain text. Other skins as Monobook work normal, the problem is with Vector skin only.
Thanks for your help.