Created Issue: AJAX RoundedCornersExtender not working when CSS Gradient applied to TargetControl [27162]

I used the following CSS entry to apply a green gradient to a button:

filter:progid:DXImageTransform.Microsoft.gradient(startColorstr='#77d42a', endColorstr='#5cb811');

When applied, the buttons will only render square, even if the CSS class is set to round the corners aswell.

AJAX version affected is: 4.1.51116.0

Removing this line from the CSS class resolves the rounded corners issue but leaves a flat colour on my shiny new button :(

Interestingly, this does not affect the BaloonPopupExtender.