Bug#267325: reproduced

[Jack Carroll <dischord@myrealbox.com>]

	This report should be merged with 268945.  He reported the same
symptoms I did with a Radeon video board.  It looks like this installer bug
is specific to Radeon boards.  One possible fix is to eliminate all video
mode switching within debian-installer, except for tests of XF86Config-4
files with the user's explicit permission.
	He also reported the same hangs during downloading installer
components that I did in another report.  In my case, however, the download
never resumed.  It timed out and had to be restarted.  Changing mirrors had
no effect.