Lubuntu Quantal fails to accept keyboard input

Bug Description

I'm just iso-testing Lubuntu 20120625/quantal-alternate-i386.iso and after running the CD test, and getting a report of no errors, the CD refuses to accept any keyboard input. I'm using a USB keyboard and I guess I could try a PS2 keyboard but this seems like a fatal flaw.

I rebooted using the reset switch and started the same disc choosing "install" rather than "check disc" and still no keyboard input. I know the keyboard was working fine just prior to testing this CD because I'd just used a live CD to erase some partitions on one drive and create a new partition table on another drive.

Oh, and the keyboard obviously works to select "check disc".

This bug has been reported on the Ubuntu ISO testing tracker.

A list of all reports related to this bug can be found here:
http://iso.qa.ubuntu.com/qatracker/reports/bugs/1017635

Status changed to 'Confirmed' because the bug affects multiple users.