Aluminum Unibody Macbook slightly unresponsive trackpad after scrolling

It has started happening as of late. It's quite bothersome though. After scrolling around or keeping my finger on the trackpad to do anything that takes some time to do, like moving something around really quick in photoshop or anything of that sort, attempting to click will almost always fail on the first attempt. Both tap to click and the physical click fail on the first attempt. It's quite bothersome and I was just curious if anyone knows what it is. Maybe it means its time for a new Macbook, but I'd rather not do that just yet.

What you're saying isn't true actually.
I work for an Authorized Apple Repair Center and we had a lot of customers complaining about the lag and unresponsiveness of trackpads in the latest generation of Unibody Macbooks.
The main issue is within the Flash 10.1 update is sometimes it is bundled with this software called "ClickForFlash" which only displays flash animations when you click on it. This causes a kernel error within Flash 10.1 that for some odd reason, directly conflicts with the operation of the trackpad.
Another reasoning is that in earlier generation (Mid 2009 and earlier) Unibody's, we've noticed that Flash 10.1 has some coding in it that refers to the trackpad's operation. By updating to the Beta Flash "SQUARE", you'll be able to eliminate this problem.
You can download this here:
http://labs.adobe.com/technologies/flashplayer10/
I hope this helps.

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In the case of my battery, I had set it aside and then had forgotten about it while I researched a replacement battery. When I found the damaged battery several weeks later, it no longer looked like the battery in your photos, with some separation of the battery case and cover. I discovered that the damaged cells had continued to expand slowly in the interim, eventually forcing the battery case completely apart. I suspect that if you observe your damaged battery over time, you'll find that the damaged cells continue to expand in the same way.
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But nothing lasts forever, and that aging battery was seriously stressed by the Leopard installation. I'm now convinced that it was its undoing. If there's a lesson to take away from this, it's probably that heat kills batteries. Eventually, the battery will die a peaceful death by exhausting its own ability to hold a charge, but until then you can reduce the chance that it will die violently in the battle of the bulge by keeping it as cool as possible

Aluminum Unibody Macbook slightly unresponsive trackpad after scrolling

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