The most recent GT5 update, v1.08 is just 1.7MB, and if you were wondering what such a small download might be for, the answer is that it that it fixes the online money glitch (also refered to as the SSR7 glitch) which allowed you to accumulate money and A-Spec experience points.
So if you were looking to cheat your way into some extra cash, it looks like you’ve missed your chance – at least with this method.
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