Hi Daniel,
I haven't seen these problems before, and I've used ltib on Ubuntu 9.04, so it can be done. What I would suggest at this point is to completely remove ltib (and the /opt/freescale directory), then re-install after making sure that your Ubuntu box is setup per the instructions in my second post on this thread.
If you don't want to run that script and instead manually figure out what to do, you should follow the steps here:
http://www.imxdev.org/wiki/index.php?title=ALL_Boards_ltib_config_ubuntu
After you have that setup, then install and re-run LTIB.
If you're still getting this problem, then go to freescale.com, login to "My Freescale", and click on Enter a Service Request to get an apps engineer from Freescale to help you out.
Mariano