Description of problem:
Strange behaviour on Rails 2.1.0 when upgrading using yum.

Some times errors arise like ("wrong argument type Fixnum (expected Proc)"),
some times Webrick and Mongrel crashes due to segmentation faults
("form_tag_helper.rb:431: [BUG] Segmentation fault") and some other times ruby
gets frozen with double free or corruption ("*** glibc detected *** ruby: double
free or corruption (out): 0x094200c0 ***").

Version-Release number of selected component (if applicable):
ruby 1.8.6 (2008-06-20 patchlevel 230) [i386-linux]

How reproducible:
Upgrade ruby to ruby-1.8.6.230-2.fc9.i386.

Steps to Reproduce:
1. Install previous Ruby from repositories
2. Install rubygems from www.rubygems.org
3. Install Rails 2.1.0
4. Upgrade Ruby to ruby-1.8.6.230-2.fc9.i386
  
Actual results:
Crashes and unexpected behaviour on Rails.

Expected results:
Rails running normally.

Additional info:
Found related information in the comments on
http://weblog.rubyonrails.org/2008/6/21/multiple-ruby-security-vulnerabilities