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It still fails completely; X will not start.

11.8 is the final working version. Looks like it will never work again, sigh.

It is still unusable for A+I Mux systems. In fact, it makes the computer unusable. X marks it as a "warning" but in fact it blocks X from loading at all.

Error reported is:

PowerXpress feature...

I have the same problem with FC14. I use Catalyst to avoid overheating on my laptop. It was agonizingly difficult to downgrade from 11.9 to 11.7. Details here:
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