Comment 7 for bug 601220

Hi Sebastian,

Now that was an interesting observation.
I did some test to find out more about the issue.

I used another installation here for comparison:
lucid-64 bit fully updated with an ATI graphics card, HD2600 Pro and lucid's own xserver-xorg-video-ati_1.6.13.0-1ubuntu5 driver.
I compared libcairo2_1.8.10-2ubuntu1 (and libpixman-1-0_0.16.4-1ubuntu2)
to the maverics libcairo2_1.9.12-1 (and libpixman-1-0_0.18.2.1).

It was indeed interesting to note that with ATI graphics card there was no color blend issues with maverics libcairo2 and libpixman-1-0, but the sluggishness of the desktop was clear and easy to observ. So at least new libcairo2 still makes system slower to respond.

On the other hand, I also tested my maverick installation with NVidia graphics card, GTX285 + nvidia-current_256.35-0ububtu2 driver.
When I downgraded the libcairo2 to the version 1.8.10 (lucid), the colors blend issues and sluggishness both were gone.