Lion battery drain fix in newest update - help???

Hi,
I was reading earlier that Apple's lastest Lion update included a fix for the battery drain issue, so I installed the update.
The MacBook was plugged in at the time so I let it charge up to 100%.
It was fully charged for over half an hour before I unplugged it.
It immediately dropped to 97%. I plugged it in again put after another half hour it still says 97%.
When I change the icon to show in Time format it says (Charged) - I assume this means fully charged - and when I pull the plug it first says (6:16) and after less than a second it drops to (5:26).
Is this happening to anybody else?
Can anyone help?
Cheers.

Please be aware that you will notice a drop in battery life for a period of time after running a repair however this does tend to settle after a week or so.
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