Here's another solution based on the matrix filter which works in IE.
http://www.boogdesign.com/examples/transforms/matrix-calculator.html
The css for -30 degrees would be:
.rotate
{
-ms-filter: "progid:DXImageTransform.Microsoft.Matrix(M11=0.86602540, M12=0.50000000, M21=-0.50000000, M22=0.86602540,sizingMethod='auto expand')";
filter: progid:DXImageTransform.Microsoft.Matrix(M11=0.86602540, M12=0.50000000, M21=-0.50000000, M22=0.86602540,sizingMethod='auto expand');
-moz-transform: matrix(0.86602540, -0.50000000, 0.50000000, 0.86602540, 0, 0);
-webkit-transform: matrix(0.86602540, -0.50000000, 0.50000000, 0.86602540, 0, 0);
-o-transform: matrix(0.86602540, -0.50000000, 0.50000000, 0.86602540, 0, 0);
}
Test page example:
<html>
<head>
<style type="text/css" media="screen">
body {
-ms-filter: "progid:DXImageTransform.Microsoft.Matrix(M11=0.86602540, M12=0.50000000, M21=-0.50000000, M22=0.86602540,sizingMethod='auto expand')";
filter: progid:DXImageTransform.Microsoft.Matrix(M11=0.86602540, M12=0.50000000, M21=-0.50000000, M22=0.86602540,sizingMethod='auto expand');
-moz-transform: matrix(0.86602540, -0.50000000, 0.50000000, 0.86602540, 0, 0);
-webkit-transform: matrix(0.86602540, -0.50000000, 0.50000000, 0.86602540, 0, 0);
-o-transform: matrix(0.86602540, -0.50000000, 0.50000000, 0.86602540, 0, 0);
}
</style>
</head>
<body>
<p>Testing</p>
<p><a href="http://www.boogdesign.com/examples/transforms/matrix-calculator.html">Matrix calculator here</a></p>
</body>
</html>
For more information on calculating the matrix cooridinates see:
http://msdn.microsoft.com/en-us/library/ms533014(VS.85).aspx
http://www.boogdesign.com/b2evo/index.php/2009/09/04/element-rotation-ie-matrix-filter?blog=2