A side note: the closest existing bug seems to be bug 316000, but this bug is distinct because this bug never manifests like that bug's screenshot, and this bug never manifests when both screens are enabled, while that bug only manifests if both screens are enabled.
I guess I should also mention that although I'm running the 2.7.0 Intel driver from the x-updates PPA, I experienced the same behaviour with stock Jaunty and with Intrepid.
A side note: the closest existing bug seems to be bug 316000, but this bug is distinct because this bug never manifests like that bug's screenshot, and this bug never manifests when both screens are enabled, while that bug only manifests if both screens are enabled.
I guess I should also mention that although I'm running the 2.7.0 Intel driver from the x-updates PPA, I experienced the same behaviour with stock Jaunty and with Intrepid.