Originally Posted by gradinaruvasile
I dont have since i use Debian... But i did mess up a few times in Ubuntu my dependencies by adding various PPAs that offered updates for key system packages out of the main repositories. I had to redo everything steb by step.
I reckon apt-pinning might help, but the problem is that everything is just put in "main" and filtering packages from larger repos is time consuming.
Yes this is the official Ubuntu X team ppa, they have stable and a cutting edge ppa just for that reason.