http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53384
--- Comment #3 from John T <jrt at worldlinc dot net> 2012-05-17 23:23:52 UTC --- I just got a good bootstrap build of gcc 4.6.3 after installing 4.6.1. The installation of 4.6.1 must have added or changed something that didn't work right in 4.4.1 on the 4.6.3 build system.