For whatever reason, just calling "do" on the tinder-config.pl script was not causing the defaults to be overriden, so we manually read & process tinder-config.pl as we did tinder-defaults.pl.

tools/tinderbox/build-seamonkey-util.pl

@@ -18,7 +18,7 @@ use POSIX qw(sys_wait_h strftime);
 use Cwd;
 use File::Basename; # for basename();
 use Config; # for $Config{sig_name} and $Config{sig_num}
-$::UtilsVersion = '$Revision: 1.21 $ ';
+$::UtilsVersion = '$Revision: 1.22 $ ';
 
 package TinderUtils;
 
@@ -248,7 +248,18 @@ sub GetSystemInfo {
 
 sub LoadConfig {
     if (-r 'tinder-config.pl') {
-        { package Settings; do 'tinder-config.pl'; }
+	no strict 'vars';
+
+	open CONFIG, 'tinder-config.pl' or 
+	    print "can't open tinder-config.pl, $?\n";
+	
+	while (<CONFIG>) {
+	    package Settings;
+	    #warn "config:$_";
+	    eval;
+	}
+	
+	close CONFIG;
     } else {
         warn "Error: Need tinderbox config file, tinder-config.pl\n";
         warn "       To get started, run the following,\n";