I've also seen this issue for a while now. Using NVIDIA GeForce GT 540M and Intel graphics card Optimus setup with Bumblebee and proprietary NVIDIA driver. Same result for using "optirun". This affects all ad banners.
** Attachment added: "example" https://bugs.launchpad.net/ubuntu/+source/software-center/+bug/999178/+attachment/3426069/+files/screenshot.png -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to fglrx-installer in Ubuntu. https://bugs.launchpad.net/bugs/999178 Title: Banners in Software Center do not work as intended and fglrx driver shows white right border To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/fglrx-installer/+bug/999178/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp