We have Internet Explorer 9 mainly in our environment. I am testing SmarterTrack version 10.6.5584.20344. I am testing this version because we are using 6.3 in production and want to upgrade very soon.
On the Home portal, the Search button is transparent with a block box around it. Then when you press "Login" at the top right that one shows up OK, but the "Register" and "Close" buttons are transparent with a black box around the buttons instead of dark gray color. Chrome and IE11 show the buttons OK. IE9 does not, even in compatibility mode for IE 8,9, or 7.
I even customized to a different color in the custom CSS like red and it does not show up in IE9. It did in Chrome and IE11.
Is this a bug? IE9 should be supported for the buttons to show correctly.