nvidia-glx-new restricted driver no longer offered for GeForce Go 7900GS

Binary package hint: nvidia-glx-new

I run up-to-date Hardy alpha, 64-bit version, on a Dell Inspiron 9400 with an nVidia GeForce Go 7900 GS. I used to use the binary nvidia-glx-new driver. However, for a while now (in the order of one or two weeks), I'm no longer offered the opportunity of using the binary driver. No clue what's going on. I think it started when I upgraded to a newer kernel (that mistakenly didn't automatically install the ubuntu modules), then had to boot an older kernel to install these ubuntu modules. Because nvidia-glx-new was also upgraded to the new kernel version, I had to go back to the "nv" driver. Since then I haven't been able to go back, even though my booted kernel version is the latest, so it should match the nvidia-glx-new driver version...