Store page not loading & "B" button unresponsive from Home Dashboard

I have same issue, now experiencing mid session unresponsiveness with all buttons but home/logo button totally unresponsive. No disconnect message, just unresponsive. Any others?

iv managed to install "Reach" from Store by searching game then installing it from there but it wont do it from "dashboard/home page"

Could you try the following ?

• Press the Home button so you're on the main page of the dashboard
  
• Press the Menu key right next to the home button and select
  Settings
• From the settings menu select Network and Advanced settings
  
• Select Alternate MAC address and Clear

You will now get a message saying you need to restart, just select restart

I'm having the same issue. I clicked on Spartan Assault and can't go back. I go to the Home screen, press my menu button and choose Quit. There are NO background instances of the Store running. I can even shut the console down and turn it back on but every
time I relaunch the store, it loads up by default to this same stupid game's page.

Seriously, Microsoft? How hard can it be to add a freakin' BACK BUTTON?????

EDIT: So I went back and cycled the power on my machine and even that won't work. The store still loads this game's page. Saying GO BACK or hitting B on the controller takes me to the XBox's Home screen, not to the store's main page. This is BEYOND ridiculous.
The store is completely broken at this point for me... even for the necessary apps I would like to download.

Sadly, I have had them a few days now, they sure did wore, but for the worst, apart from A button being unresponsive, the sticky is gone but it is just plain unresponsive, and it is now affecting B button now.