After selecting "Check disc for defects", the splash screen appears and begins scrolling through the progress dots. This will continue forever, with no text being displayed.
If Esc is pressed, you can see that the disc check is being done in the background. And indeed, if you press any key during the splash screen (after giving sufficient time for the check to complete), the progress dots will all light up (indicating the task is complete) and the LiveCD will reboot as it should.
This bug is in both Ubuntu and Lubuntu Alpha 3 ISOs at least, 32-bit on a 16 GB USB stick using usb-creator from Lubuntu Natty.
ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: casper (not installed)
ProcVersionSignature: Ubuntu 3.0.0-7.9-generic 3.0.0
Uname: Linux 3.0.0-7-generic i686
Architecture: i386
Date: Mon Aug 8 02:55:58 2011
InstallationMedia: Lubuntu 11.10 "Oneiric Ocelot" - Alpha i386 (20110801)
ProcEnviron:
LANG=en_US.UTF-8
SHELL=/bin/bash
SourcePackage: casper
UpgradeStatus: No upgrade log present (probably fresh install)
Brian, could you have a look at it, I can't reproduce it on Ubuntu or Lubuntu