Not you at all, tai: the box only stopped the NEXT notices, and OK still saved and reloaded you straight away. Now, if you tick "Don't update now, and don't tell me for 24h" (the box has a clearer name too), either button keeps you in the game and you won't be asked again for 24 hours, unless an update is marked important. OK without the box ticked still saves and reloads onto the new update. To re-test: on the next update notice, tick the box and press OK. You should stay where you are.