[maytag]

You're one of the smarter guys on this board, so I scratch my head trying to imagine something you wouldn't have already thought of. But I'll suggest some things I'm thinking, in the hopes it'll jog a thought.

Does your car have PSM?

RacerBoy and JayG seem to be thinking along the sames lines as I am: "Glazed pads". What pads are you using, and did you heat them (coming down a conyon, or?) prior to the symptoms appearing. I've been known to "deglaze", when my budget required it. Use a palm sander on the pads and even on the rotors. You're not trying to change the shape, just remove the top glazing that's there. Organic pads are notorious for this. (I've done the same with clutches, fwiw)

Do we understand correctly that this more or less happened "overnight"? and your fluid flush was done to mitigate, not done before, right? I ask because a mis-mix of brake fluid can cause obstructions in the master-cylinder or the lines or the calipers. (DOT 5 doesn't mix with other fluids, for instance,and will create nasty gel in the lines) You hadn't topped-off the fluid recently, or anything, right?

From there, I think I'd be pulling all 4 calipers, inspecting visually, probably cleaning thoroughly, maybe a seal kit if there's one available (I assume there is, they're Brembo) and then this is where scope-creep would take over: I'd be doing pads, rotors, steel-braided lines, etc. Then a complete flush. That oughtta do it, haha. (Sounds like a fun winter project?)