Looking at my install log, I see it contains my Administrator password:
(dll/win32/syssetup/security.c:333) SYSSETUP: SetAdministratorPassword(bk5ua2)
I edited it before posting this bug.
Where there is bk5ua2 my typed administrator password was.
I believe it is a serious security issue that logs that are likely to be attached to bug reports contain the administrator password.