Ruby Curl::Multi.http 302 redirect problems - ruby

Question

I seem to be having a problem with 302 redirects using curb (Ruby's curl programs)
Here's the code snippet that is ** NOT working** (it's NOT doing the 302 redirect)
easy_options = {:follow_location => true, :enable_cookies => true, :useragent => 'curb', :cookiefile => 'cookie.txt'}
multi_options = {:pipeline => true}
url_fields = [
{
:url => 'https://x.y.z/webapps/login/',
:method => :post,
:follow_location => true,
:enable_cookies => true,
:useragent => 'curb',
:post_fields => {
'user_id' => 'xxxx',
'password' => 'xxxx',
'action' => 'login',
'encoded_pw' => Base64.strict_encode64('xxxx')},
}
]
Curl::Multi.http(url_fields,{:pipeline => true}) do |easy, code, method|
puts easy.header_str
end
Here's the code snippet that appears to be working (it's doing the 302 redirect)
easy_options = {:follow_location => true, :enable_cookies => true, :useragent => 'curb', :cookiefile => 'cookie.txt'}
multi_options = {:pipeline => true}
url_fields = [
{ :url => 'https://x.y.z/webapps/login/',
:post_fields => {
'user_id' => 'xxxx',
'password' => 'yyyy',
'action' => 'login',
'encoded_pw' => Base64.strict_encode64('yyyy')}}
]
Curl::Multi.post(url_fields, easy_options, multi_options) do|easy|
# do something interesting with the easy response
puts easy.last_effective_url
end
Question: Why is the first block not doing the 302 redirect as expected? :follow_location is set to true?
Thanks in advance!
Let me know if you need more information