FMS Bandwidth Detection Inaccurate in IE

Question

I'm having a problem with Flash Media Server's native bandwidth detection. When I run the test on firefox I get a nice consistent 80Mbps (give or take 5Mbps). However when I run the test on IE I get wildly varying results. One moment I'll get ~370Mbps, next I'll get 170Mbps, and often I will get OMbps.

I do call some potentially browser specific javascript from an external interface before performing the test, but I don't see how this effects the BW Test.

var bwsrInfo = ExternalInterface.call("function(){ return navigator.userAgent; }");

Has any one run into this issue before?