[chef] Fail to install chef-server on Ubuntu 12.04, new Ruby.

[< >]

Hello,

I'm seeing an error installing chef server on Ubuntu 12.04, with the system
ruby updated to 1.9.3.

Following the steps on the wiki:
http://wiki.opscode.com/display/chef/Installing+Chef+Server+on+Debian+or+Ubuntu+using+Packages
an error occurs starting chef:

Setting up chef-server-api (10.18.2-1) ...

Creating config file /etc/chef/server.rb with new version
 * Starting chef-server 
/usr/local/lib/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require':
cannot load such file -- merb-core (LoadError)
        from /usr/local/lib/site_ruby/1.9.1/rubygems/custom_require.rb:36:in
`require'
        from /usr/sbin/chef-server:24:in `<main>'
   ...fail!

Does chef server still run with 1.9 ruby?