Areo rendering with window transparency

[JO7]

I'm really enjoying Dexpot. It's great for helping me get my homework done quickly--when I'm not engrossed in tweaking the settings...

I've got this problem though. When I set a window to transparent, sometimes, when I move it, I get an annoying little shaded square in the title bar:

(I couldn't take a screen shot. It always re-rendered or something, but I could sort of re-create it here.)
As you can see I'm using an Aero theme. In addition, this only happens when window are transparent

[Patrick]

Do you have any other tools running in the background? Maybe something that can add additional buttons to the title bars?

[JO7]

Thanks for the reply.

Nope, I don't have any other fancy UI programs running. The only program that comes vaguely close to adding buttons to the title bar is Rainmeter. Note: I do have aero running, but I assume you already know that.

Other than that I think the running applications were notepad, PowerPoint, Google Chrome, and Paint.
I still get the funny square with just Chrome running. It goes away when the transparent window looses focus, but it is a little annoying.
I've attached a task list from cmd stating the programs running immediately after I tried it with just Chrome.

<file removed.>

[Sebastian]

,

try disabling the ELAN touchpad driver tools for the moment.

[JO7]

I couldn't disable it. I uninstalled it, but when I restarted as prompted, it was still on my system. There is no option to disable it while leaving it installed. I don't think it's causing the problem though. I use a different mouse most of the time, and it is only a minor inconvenience.