Your best bet is to run at least one of the 2038 test scripts yourself.

Here are some archived outputs for various platforms for reference:

http://www.lugmen.org.ar/pipermail/lug-list/2005-May/035318.html

http://www.sec.org.il/coverages.php?c=53

http://unix.derkeiler.com/Mailing-Lists/AIX-L/2004-01/0011.html