MBP won't sleep and battery drains quickly since 10.6.3 update, help!

My 15" MBP refuses to sleep when I close the lid, it's very frustrating cause now I cant just close the lid when I'm done using it cause the battery runs down and it gets very hot. This is only since the 10.6.3 update, I've tried repairing the permissions but no luck, even when I choose 'Sleep' from the Apple pref menu it still doesn't sleep.
Any idea's?
Along with this and the screen flickering issue plus a few other bugs I'm really starting to wonder how I justified paying £2k+ for this machine

Nope, reset the SMC.
When I try put it to sleep it wakes up 15seconds on the button every time. When I close the lid to put it to sleep the apple logo on the lid lights up every 15 seconds aswell.

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Hey this is Brian, bjmcmurry, under a different user ID. If I logged in as bmcmurry, original post, I was just getting a server error and couldn't get to this discussion nor post a comment anywhere.
Anyway, let me be as brief as I can. After an extensive analysis of replicating the problem on another phone to eliminate it being a hardware specific issue and that the test phone has an unlimited data plan, I was able to stop the excessive data usage and consequential battery drain. I believe I have a reasonable explanation of the problem, an iOS logic bug.
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MBP won't sleep and battery drains quickly since 10.6.3 update, help!

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