'Notifications' Drop Down IE7 CSS Issue...

[pneo]

I am currently at the de-bugging stage of our CSS driven (using additional.css) style - I have come across an issue with our IE7 compatibility.

Our style currently specifies the background of .popupbody of the 'Notifications' dropdown in the 'Top Links' section by using the following additional CSS;

.nonotifications div.popupbody {
        background: url(/background/black50transparent.png);
        border: none;
}

However, in IE7 it does not pick this up and seems to revert to just '.popupbody {'. Using the 'Vbulletin-ie.css' I can change the background color of '.popupbody {' and it carries across to IE7, however when I try to specify it further (I do not want this background to cover all popupbody's) it does not work.

For example I have tried specifying;

.toplinks .popupbody {

.nonotifications .popupbody {

.nonotifications div.popupbody {

Can anybody help? This really has me stumped!

Thank you in advance for any help and guidance - I look forward to reading any replies.