I am just flagging this as a possible problem... Just as a test I tried the 2010-03-14-svn-R2456-final-UBUNTU_9.10.tgz
I run SUSE, so I WAS expecting problems. Normally I load the CENTOS version without any problems which is not yet available as a binary install. On running it failed, and gave a short error message, it said it needed libc.so.6, in GLIBCXX 3. something I can't remember the exact version. The install.txt only mentions the requirement of libc.so.6, which is the same as for the 2009-02-16 version that I normally run without problems. This may be a UBUNTU specific issue, or maybe something else. if libc.so.6 is already available, then crashing out with a GLIB version issue does not seem correct. Of course it may be looking for something else as well. The install txt also mentions the chmod command, but on the kicad/linux directory, I think this should be the kicad/bin directory as per the previous version. Andy