I suspect that the contents of one or more of your variables is not what you think. Try the following untested code (or the corrected semblance thereof):

print "'$_'\n" foreach @admin_users;
print "\n\n\$author: '$author'\n";
print "\$blah: $blah\n";
print "\$uber_blah: $uber_blah\n";
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I notice that blah and uber_blah are variables. Do they contain different values? HTH.

--Jim