[gouda:root]/home/alex/ckeditor-git/ckeditor-dev# bash ./dev/builder/build.sh
CKBuilder - Builds a release version of ckeditor-dev.
Downloading CKBuilder...
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 6571k 100 6571k 0 0 530k 0 0:00:12 0:00:12 --:--:-- 590k
Starting CKBuilder...
Exception in thread "main" org.mozilla.javascript.EvaluatorException: Function importClass must be called with a class; had "[JavaPackage com.google.javascript.jscomp.CompilationLevel]" instead. (/home/wiktor/CKBuilder/src/lib/javascript.js#12)
I had to truncate the error message because the spam filter on the forum blocked the output.
My Java foo does not exist. Any pointers for this one?

Can you check what Java
Can you check what Java version do you have exactly? I've seen something similar on old Open JDK.
Wiktor Walc
CTO, CKSource - http://cksource.com
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Thanks Wiktor. An update to
Thanks Wiktor. An update to OpenJDK has solved it. Now running:
openjdk version "1.6.0_32"
OpenJDK Runtime Environment (build 1.6.0_32-b30)
OpenJDK Server VM (build 23.25-b01, mixed mode)
Thanks,
Alex