[flexcoders] userAgent failing to return info in IE 6 since security update - anyone else?

[Jason The Saj]

I've been using the following for determining browser:

var browserAgent:String = ExternalInterface.call("function
getBrowser(){return navigator.userAgent;}");

if(browserAgent != null &&
browserAgent.indexOf("Safari/IE/Firefox/Etc") >= 0){}

But recently, IE has ceased returning the info. I noticed this after a
recent "security update". Anyone else have this problem? Anyone found
a solution?