Maybe a bug about Graphic Card?

macbook pro 15-inch, Mid 2010
graphics is NVIDIA 330M
I have switch automating graphics.
When i change the graphics(use the nvidia card), the window's color is a little blue.But it is normal when intel card.
Is this a bug in Mountain Lion?
It has last long from DP2.

Greetings,
I've accidentaly found a way to fix this, or at least I think i did...
0.-Make sure every app is closed (if not, step 6 will fail).
1.- install gfxcard status from codekrieger.
2.- choose Discreet graphics only.
3.- enter system preferences.
4.-enter energy saver. (As you will notice the legen for automatic switching dissapears and the message found in older macbooks appears, which lets you choose which graphics card to use).
5.-Choose better battery life.
6.-Reboot.
7.-Voila the problem is gone.
I do not know why this works, but ive tried it on several Macs and it has worked on all of them, if you later do a NVRAM Reset, you will need to re-do the procedure, also if you re-install mountain lion, you will need to do it all over again...
Hopes this Helps.
Thanks...

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