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The problem is likely related to this case:
The workaround in there should be the answer. Basically, for IE, you need to move the CSS output components to the bottom of the view/page:
<ice:outputStyle href="/resources/css/ehp.css" />
<ice:outputStyle href="/resources/css/jquery-ui.css" />
<ice:outputStyle href="/resources/css/custom.css" />