i've tried a fresh install of WLS 6.1 sp3 on a red hat 7.2 box with jdk 1.3.1_04 and the server will not start.
I've tried the mydomain and the examples servers.
I've tried with and without running setEnv.sh prior to startWeblogic.sh.
I thought it could've been a classpath problem so i tried taking the cp down to just the weblogic.jar, but the results were the same.
full output of startWeblogic.sh: