Really sorry, folks. :\ I made the fatal error of jumping the gun
before waiting for testing bot results on a "trivial" patch http://drupal.org/node/471234
which just so happened to break the installer. Oops. :\
I'm pretty sure I reset the statuses of all the issues that were
mistakenly "needs work"ed but if you see that testing bot has said
that your patch has "Failed: Failed to install HEAD." sometime
tonight, go ahead and submit it for re-testing, as it was probably a
mistake.
/me dons the dunce cap of SHAME...
-Angie