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Well, it didn't work for two people for Red Hat 6.2 .  Perhaps being 
more explicit for the test?  To give that a shot, I am uploading a 
patch that tests explicitly for AEDT as the daylight-savings 
timezone.  I snagged the code mostly from Modules/timemodule.c 
.

Now this is untested so there could be syntax problems.  I can't 
get a proper version of Autoconf to run on my system so I can run 
autoreconf.  Hopefully this will deal with the problem.