Dear all,
The latest version of onlinejudge has an improved sandbox which is self-configurable and self-testable. That means, hopefully, "make" can generate sandbox which works better on different Linux distributions.
If the version you are using works well, you do not need to upgrade. If the old sandbox didn't work (such as restricted functions forever) in your Linux, this is just what's you want.
P.S. I retreated from google code. All the new updates will be at
https://github.com/hit-moodle . Github is awesome! I believe you will like it too!