Erratic trackpad issues

Recently, my trackpad has been acting up.
Symptoms: (just SOME, not all)
-cursor/arrow will move on its own
-random areas will become highlighted
-gestures are wonky (ex: swiping from left to right with one finger will change entire desktops)
-screens will zoom in
-left mouse click acts as if the right mouse button was clicked
It's almost as if someone has taken control of my trackpad.
Note: I have Lion 10.7.1
Remedies already tried:
-PRAM reset
-SMC reset
-shut down computer and let rest for a few hours
-software update
-turning off all trackpad and gestures
I've read Apple's official explanation for an erratic trackpad (which was useless to me) and other users' experiences but none seem to match what's going on with mine. I know I can take it to a store and have some "Geniuses" look at it, but I was hoping to exhaust all possible at home solutions first.
Has anyone had similar problems, and what did you do???
I really appreciate any feedback.

Ralph,
I tried the SMC Reset - and it helps to an extent. It works fine, albeit a little sluggish, for about 10-15 minutes before it becomes sluggish and erratic again.
The magsafe led colour is either orange/yellow or green (when fully charged). The charge button on the side shows that green lights fill up except for the last one which flashes.
I'm now trying a software update but I don't know if that will work.

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I have been fighting what seems like the same problem. Switching to another application and back seems to fix it - at least for a few minutes..

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I don't have warranty or apple care anymore, and maybe I shoud, considering all the issues I've had. I guess, does anyone know how much it would cost to get this fixed? The drive to the Apple Store is pretty far for me. Is it even worth it to have it fixed? Could I fix it myself ordering parts?
I've also had a buzzing left fan for a while. It still keeps my laptop cool, according to iStat Menus, but I'm thinking it's about to die.
2 years seems kind of quick to buy a whole new laptop, but if the price to fix the fan and the trackpad is over $500, maybe I'll just sell this one as a parts laptop on ebay for $1000 which is less than half of what I paid and use that to get a new one.

Some reading for you:
http://support.apple.com/kb/TS1449
Try a SMC reset:
http://support.apple.com/kb/HT3964
You may have a swollen battery which would need to be replaced, you can take it to a Genius bar for a free evaluation, make an appointment first. Or a logic board that has gone belly up.
http://www.apple.com/retail/geniusbar
Good luck

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I can no longer find the thread nor am I still subscribed. Yet except for a patch that is only for Late 2008 laptops and a hacked version of the patch from a user that never fixed any of the problems on my machine, there has no been no updated driver from Apple.
What's the deal?

What problems with trackpad issues? There are none! Haha... Just Kidding...
http://discussions.apple.com/thread.jspa?threadID=1433222&tstart=45

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Since any diagnostics at this point are utterly deadlocked, no; however see SMC reset below for last chance option before appt. with Apple
re-verify still the same.
Make an appt. with your local Apple store for full diagnostics and possible reinstall of your OS.
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Peace.
See if you can perform a SMC reset to get out of same:
SMC reset
Shut down the computer.
Plug in the MagSafe power adapter to a power source, connecting it to the Mac if its not already connected.
On the built-in keyboard, press the (left side) Shift-Control-Option keys and the power button at the same time.
Release all the keys and the power button at the same time.
Press the power button to turn on the computer.
Note: The LED on the MagSafe power adapter may change states or temporarily turn off when you reset the SMC.

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Hi there,
Hope you can help me out here.
I've recently purchased a 15" i7 Macbook pro. The machine is but 3 weeks old &, of course, very well looked after.
A few days ago, the built-in trackpad started behaving eratically. Cursor moving by itself, not responding to touch, clicking and opening things involuntarily. Not good at all. Many users seem to have had this exact same issue.
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I can't thank them enough.
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If you have a model with a removable battery, pull the battery and try running without it. I had a problem with my battery swelling and it created all weird trackpad issues. I replaced the battery and it cleared them all up.
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Be paticent.
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http://support.apple.com/kb/HT3964
Follow the directions that apply to your machine regarding battery, remove or don't remove yourself.
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Be paticent.
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http://support.apple.com/kb/HT3964
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It could be that the trackpad isn't securely connected. This isn't so likely since it does work sometimes, but it's worth mentioning.
http://discussions.apple.com/thread.jspa?messageID=1034519#1034519

Erratic trackpad issues

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