This update of ruby provides 1.8.7p357, which contains many
stability fixes and bug fixes, which are fully compatible
with the previous version. You can review the detailed list
here:

http://svn.ruby-lang.org/repos/ruby/tags/v1_8_7_357/ChangeLo
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The particularly noteworthy fixes are:

- Hash functions are now using a randomized seed to avoid
algorithmic complexity attacks (CVE-2011-4815). For this
OpenSSL::Random.seed at the SecureRandom.random_bytes is
used if available.
- mkconfig.rb: fix for continued lines.
- Fix Infinity to be greater than any bignum number.
- initialize store->ex_data.sk.
- some IPv6 related fixes
- zlib fixes
- reinitialize PRNG when forking children
(CVE-2011-2686/CVE-2011-3009)
- securerandom fixes (CVE-2011-2705)
- uri route_to fixes
- fix race condition with variables and autoload