Hi Craig,
Not sure why this particular request got a bad response from the server, is Apache still running or has it crushed?
You can try:
# /opt/kaltura/bin/kaltura-drop-db.sh
and then rerun the kaltura-config-all.sh script and see if it fails again.
You also don't need to reinput everything, the install scripts create answer files under /tmp/kaltura_*.ans files which you can pass to any of the config scripts rather than reinputting interactively.
You will probably see two of these files under /tmp concat them together and run:
# /opt/kaltura/bin/kaltura-config-all.sh /path/to/ans/file