This is about: http://docs.fedoraproject.org/install-guide/f13/en-US/html/ap-admin-options.html#sn-boot-options-interface The documentation should be updated to reflect that the minimum resolution is 800x600 not 640x480. Smaller devices are supported through the VNC install. Related bug: 592809.
Ales: Thanks for reporting this. I have committed a fix for this as detailed below: commit 452fc52381c5fb523b6714da59ba9a9e5f2a06e6 Author: David Nalley <david> Date: Sun Jun 20 15:43:54 2010 -0400 fixing bug 593362 - minimum resolution is 800x600 instead of 640x480