ExternalInterface.call in windows 7

I know this is probably not the best place to ask, but hoping/wondering if someone has came across the same issue, and found a solution.

I am using ExternalInterface.call("window.open",#,#,#) to open a web page in a new browser window.

has been working just fine for some time now in windows XP (still is for the most part), however, we are now getting upgraded to windoze 7, and it is behaving differently.

Now, when I click on the feature that involks the ExternalInterface.call, I get three, new windows opening, all with the same URL.

anyone found a cause/fix for this yet?

Thanks for any help,

R_

PS, we are forced to use IE 8, so that is the browser being used.