Try the code below in IE7 and Firefox (evaluate it in IE's debug bar console and Firebug's console).
You will see that the text is NOT rotated in IE, but it's rotated in Firefox.
How do I work around this issue in 4.0.7?
To make this more interesting, I'd like to add that text rotation works as expected in IE8, but not in IE7.
text: 'My Text component',
font: '12px Arial',
viewBox is set to true - this is an important point.