That thing has more vulnerabilities in it than I got teeth in my mouth.
I'm pretty sure there's been more than 3 vulnerabilities for IE/OE but I'll take your word for that.

As an aside, are you going to fund the training budget for my 650 users? Then, when Opera or Firefox or whatever are the ones suffering all the vulnerabilities while IE is no longer the target are you going to fund the retraining budget?

Oh, and before someone jumps up and tells me that you can make Mozilla or whatever look just like IE..... Trust me, as stupid as users are they recognize the change and it is my experience that the one thing the idiots can't handle, and makes them whine the most, is change.