Boot (after install): MEMORY_MANAGEMENT bugcheck

QEmu 0.9.1, 49 MB RAM + 451 MB raw disk.
Official bootcd-nnnnn-dbg.iso

While testing CORE-4870, [Reproduced with raw disk]
I noticed that (re)booting ROS randomly/easily/soon ends with
FSE 0x1a then BSoD "MEMORY_MANAGEMENT".

Good:
*r56225: works fine.
*r70461: reliable exception/hang during boot (after install).
*r70467: works fine.
*r70675: works fine.
Bad:
*r73601: frequent/random failures.
Regression:
between r70675 and r73601.

NB:
I had recently built some bootcd and didn't notice this issue.
Then, it would probably be (very) recent.

PS:
I recompiled r73601 locally, and did a quick test,
but it seemed to work fine :-/