Authenticator change?

[moog]

I stopped using the authenticator when they made the codes single use - I'm not going to spend 2.5m every time I want to log in.

This change is great for us multiboxers and I've slapped the hardware authenticator back onto my battle.net account.

I was asked for my code on the first login, Friday morning, then not again all day Friday and Saturday.
I played this morning and then happened to update my ATI graphics drivers (11.6 gives a definite FPS boost for me!) and my next login requested the code, so it's obviously doing some sort of hardware/software configuration check, which is nice.

[Hyper]

it's obviously doing some sort of hardware/software configuration check, which is nice.

Actually, no it isn't. I have logged into my accounts from 4 completely different machines in my household and the last time it asked for a code was on Friday. The only thing in common is the router and cable modem. I imagine the next time I am asked for a code will be when my dynamic IP is refreshed with the service provider, but that is only a guess.
I kind of like not having to put in my code for every single little disconnect that I have, but it doesn't make me feel as safe as putting in a code every single time.