Comment 5 for bug 1069299

Quick note: bug 1068661 is for a RadeonHD 6000-series card and isn't the same as this one.

Yeah, I see those other bug reports where you keep claiming that any source that's not the AMD website is "conjecture." The AMD site is not infallible and is not intelligent enough to prevent you from installing an incompatible driver (just like Synaptic or software-center). As an experiment for you: put a Radeon X1600 in your system, and go to the AMD website. Good luck trying to install the ancient Catalyst 9-3 driver on anything later thean Hardy/8.04 (even though you meet the minimum requirements)...
To take your logic further, you could file a bug against the nvidia package when you download the nvidia driver on your system and it doesn't work (even if you don't have an nvidia card). Anyway....

Ubuntu does not support installing drivers from the AMD website, so your mention of Catalyst 12-6 is moot, unless you want to make a wishlist bug asking Canonical to offer the 12-6 Legacy driver. That would be helpful to a lot of users, and I hope it happens, but I wouldn't hold my breath based on how AMD handled this last time (Catalyst 9-3).

Conclusion: this "bug" is Invalid because the user installed the wrong driver on his/her system (just like if an intel user installed the nvidia driver) If you wish, please file a new bug requesting a new package (fglrx-legacy-installer or something like that).