gem を update した

log

MacBook Airのgemをアップデートした．

% sudo gem update --system
Password:
Updating RubyGems
Updating rubygems-update
Successfully installed rubygems-update-1.7.1
Updating RubyGems to 1.7.1
Installing RubyGems 1.7.1
RubyGems 1.7.1 installed

=== 1.7.1 / 2011-03-32

* 1 bug fix:
  * Fixed missing file in Manifest.txt.  (Also a bug in hoe was fixed where
    `rake check_manifest` showing a diff would not exit with an error.)


------------------------------------------------------------------------------

RubyGems installed the following executables:
	/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/gem
% gem outdated     
RedCloth (4.1.1 < 4.2.7)
actionmailer (2.3.5 < 3.0.5)
actionpack (2.3.5 < 3.0.5)
activerecord (2.3.5 < 3.0.5)
activeresource (2.3.5 < 3.0.5)
activesupport (2.3.5 < 3.0.5)
acts_as_ferret (0.4.3 < 0.5.2)
capistrano (2.5.2 < 2.5.20)
daemons (1.0.10 < 1.1.2)
dnssd (0.6.0 < 2.0)
fastthread (1.0.1 < 1.0.7)
fcgi (0.8.7 < 0.8.8)
highline (1.5.0 < 1.6.1)
hpricot (0.6.164 < 0.8.4)
libxml-ruby (1.1.2 < 1.1.4)
net-scp (1.0.1 < 1.0.4)
net-sftp (2.0.1 < 2.0.5)
net-ssh (2.0.4 < 2.1.4)
net-ssh-gateway (1.0.0 < 1.0.1)
rack (1.0.1 < 1.2.2)
rails (2.3.5 < 3.0.5)
rake (0.8.3 < 0.8.7)
ruby-openid (2.1.2 < 2.1.8)
sqlite3-ruby (1.2.4 < 1.3.3)
xmpp4r (0.4 < 0.5)

gem update したかったけど，エラーになった

ERROR:  While executing gem ... (Gem::FormatException)
    builder-2.1.2 has an invalid value for @cert_chain