Well, thank you both for the background. Not being in IT, it is hard to know who or what to trust. I downloaded the patch with (seemingly) no ill effects.
What is it with mother's sayings? That one is straight from mine's lips! LOL
I'm going to think about it for a while before I do anything with it.
The unofficial patch seems to revolve around the desire to show images whilst Netting. I've de-registered, and I'm only allowing images from the originating site (FireFox). I'm thinking about disallowing images totally, until the official patch comes out, but who knows how long Redmond is going to take.