When I change $var it is simultanously changed in $HTTP_GET_VARS["var"].  This is causes definate migration issues when using $HTTP_GET_VARS.   This is true for $HTTP_POST_VARS also. (and probably $HTTP_COOKIES_VARS too)  I would prefer the old way where these were seperate variables but if the is is to be the "new way" it needs to be listed on the migration page.

This is incredibly basic but it may speed up the testing.  Call it with various values for test sent by get or post.
print "test=$test<br>\n";
print "HTTP_GET_VARS[test]=".$HTTP_GET_VARS["test"]."<br>\n";
print "HTTP_POST_VARS[test]=".$HTTP_POST_VARS["test"]."<br>\n";
print "<hr>\n";
$test=2;
print "test=$test<br>\n";
print "HTTP_GET_VARS[test]=".$HTTP_GET_VARS["test"]."<br>\n";
print "HTTP_POST_VARS[test]=".$HTTP_POST_VARS["test"]."<br>\n";
print "<hr>\n";
$HTTP_GET_VARS["test"]=3;
$HTTP_POST_VARS["test"]=5;
print "test=$test<br>\n";
print "HTTP_GET_VARS[test]=".$HTTP_GET_VARS["test"]."<br>\n";
print "HTTP_POST_VARS[test]=".$HTTP_POST_VARS["test"]."<br>\n";