Why can't i access the Tandor Network in the Pokemon Center?

[Lord Windos]

Iron has the right first step. The game blocks online access if you're running anything but the most recent version of the game. We do this to keep players from exploiting bugs that were later fixed in newer version.
and run the Patcher after re-installing the game to update to 1.2.1

What bugs could be exploited online in the past? Never heard about them here on the forums....or at least not anywhere else but the bug report thread.