Hello,
I've noticed some themes (Cupertino and Redmond) for example have different .ui-widget styles that other themes.
For example -
Cupertino (not working correctly) - ..ui-widget{font-family:Lucida Grande,Lucida Sans,Arial,sans-serif;font-size:1.1em}
Pepper Grinder (working correctly) - .ui-widget{font-family:Trebuchet MS,Tahoma,Verdana,Arial,sans-serif;font-size:1.1em}
If you create a button and look at the position of the text, it will not align correctly in Cupertino using IE 9 or above.
Thanks,
John