diff -Nurd Sources.orig/Lib/FUNC.pm Sources/Lib/FUNC.pm
--- Sources.orig/Lib/FUNC.pm	Sun Jul 14 00:47:08 2002
+++ Sources/Lib/FUNC.pm	Mon Feb  3 09:39:48 2003
@@ -101,7 +101,7 @@
 
 	my $sid = $iB::IN{'sid'} || $iB::COOKIES->{$iB::INFO->{'COOKIE_ID'}.'skin'};
 	# Make sure it only contains a number
-	$sid =~ s/^(\d+)$/$1/;
+	$sid =~ s/^(\d+)$/$1/ or die "invalid sid value";
 
 	# Make sure we have a default skin set
 
@@ -188,7 +188,8 @@
 
 	# Make sure the cookie data is legal
 	if ($iB::COOKIES->{$iB::INFO->{'COOKIE_ID'}.'lang'}) {
-		$iB::COOKIES->{$iB::INFO->{'COOKIE_ID'}.'lang'} =~ s/^([\d\w]+)$/$1/;
+		$iB::COOKIES->{$iB::INFO->{'COOKIE_ID'}.'lang'} =~ s/^([\d\w]+)$/$1/
+			or die "invalid lang cookie value";
 	}
 
 	$default = $iB::COOKIES->{$iB::INFO->{'COOKIE_ID'}.'lang'}