Possible Radeon 7000 PCI memory leak?

Is the radeon 7000 card known to have memory leak issues?
because when binding textures to this LARGE client state object it doesn’t seem to free them from texture memory, because the next time I build&execute the same app, or load similar opengl applications it flashes the application that was previously loaded on the screen repeatedly around half-second intervals in a fashion that somewhat resembles what a binary file looks like in a text editor. I had previously installed unofficially released drivers for my card, which did NOT pass windows logo testing.

Is this related to installing the questionable drivers, or is it with the radeon itself? thanks in advance.