The subject says it all.
I build pretty often. The last one that works is 9548.
None of the images that lack "2.6" in their filename has booted for me, if that's a clue for anyone. They get to the point after detecting the FPU emulator, where "-preinit-" ought to show next, and then hang.
Sorry I can't help fix this. This has happened before a couple of times,and then things started working again. But the spells have never lasted as long as this one.