The util-linux package provides the mcookie utility, a tool for generating random cookies that can be used for X authentication. The util-linux packages that were distributed with Mandrake Linux 8.2 and 9.0 had a patch that made it use /dev/urandom instead of /dev/random, which resulted in the mcookie being more predictable than it would otherwise be. This patch has been removed in these updates, giving mcookie a better source of entropy and making the generated cookies less predictable. Thanks to Dirk Mueller for pointing this out.