Making updateComputedView() work in IE, and using lib.instanceOf() for stylesheets in getStyleSheetRules() to avoid errors in Opera.
Making updateComputedView() work in IE, and using lib.instanceOf() for stylesheets in getStyleSheetRules() to avoid errors in Opera.

git-svn-id: cc12c73f837f4c86aedaac3e81d294eae78e8bd7@5820 e969d3be-0e28-0410-a27f-dd5c76401a8b

darwin/firebug.lite