FeedTools behaves oddly with JRuby

With Ruby 1.8, FeedTools is able to get and parse rss/atom feed links
given a non-feed link. For eg:

ruby-1.8.7-p174 > f = FeedTools::Feed.open(“http://techcrunch.com/”)
=> #<FeedTools::Feed:0xc99cf8
URL:Crunch Hype>
ruby-1.8.7-p174 > f.title
=> “TechCrunch”
Whereas, with JRuby 1.5.2, FeedTools is unable to get and parse rss/atom
feed links given a non-feed link. For eg:

jruby-1.5.2 > f = FeedTools::Feed.open(“http://techcrunch.com/”)
=> #<FeedTools::Feed:0x1206 URL:http://techcrunch.com/>
jruby-1.5.2 > f.title
=> nil
At times, it also gives the following error:

FeedTools::FeedAccessError: does not appear to be a feed.

Any ideas on how I can get FeedTools to work with JRuby?