Code:
Jabber::debug = true
client = Client::new()
client.connect('xmpp.yandex.ru', 443)

Output:
10:10:07 Debugging mode enabled.
10:10:07 CONNECTING:

xmpp.yandex.ru:443                                                                                                                       

10:10:07 SENDING:

<stream:stream xmlns:stream='http://etherx.jabber.org/streams' xmlns='jabber:client' to='yandex.ru' xml:lang='en' version='1.0' >        

10:10:07 EXCEPTION:

NoMethodError                                                                                                                            
undefined method `[]' for nil:NilClass                                                                                                   
/usr/lib/ruby/1.8/rexml/source.rb:149:in `initialize'                                                                                    
/usr/lib/ruby/1.8/rexml/source.rb:16:in `new'
/usr/lib/ruby/1.8/rexml/source.rb:16:in `create_from'
/usr/lib/ruby/1.8/rexml/parsers/baseparser.rb:133:in `stream='
/usr/lib/ruby/1.8/rexml/parsers/baseparser.rb:110:in `initialize'
/usr/lib/ruby/1.8/rexml/parsers/sax2parser.rb:11:in `new'
/usr/lib/ruby/1.8/rexml/parsers/sax2parser.rb:11:in `initialize'
/usr/lib/ruby/1.8/xmpp4r/streamparser.rb:39:in `new'
/usr/lib/ruby/1.8/xmpp4r/streamparser.rb:39:in `parse'
/usr/lib/ruby/1.8/xmpp4r/stream.rb:75:in `start'
/usr/lib/ruby/1.8/xmpp4r/stream.rb:72:in `initialize'
/usr/lib/ruby/1.8/xmpp4r/stream.rb:72:in `new'
/usr/lib/ruby/1.8/xmpp4r/stream.rb:72:in `start'
/usr/lib/ruby/1.8/xmpp4r/connection.rb:102:in `start'
/usr/lib/ruby/1.8/xmpp4r/client.rb:86:in `start'
/usr/lib/ruby/1.8/xmpp4r/connection.rb:61:in `connect'
/usr/lib/ruby/1.8/xmpp4r/client.rb:71:in `connect'
main.rb:14

Exception caught in Parser thread! (NoMethodError)
/usr/lib/ruby/1.8/rexml/source.rb:149:in initialize' /usr/lib/ruby/1.8/rexml/source.rb:16:innew' /usr/lib/ruby/1.8/rexml/source.rb:16:in create_from' /usr/lib/ruby/1.8/rexml/parsers/baseparser.rb:133:instream=' /usr/lib/ruby/1.8/rexml/parsers/baseparser.rb:110:in initialize' /usr/lib/ruby/1.8/rexml/parsers/sax2parser.rb:11:innew' /usr/lib/ruby/1.8/rexml/parsers/sax2parser.rb:11:in initialize' /usr/lib/ruby/1.8/xmpp4r/streamparser.rb:39:innew' /usr/lib/ruby/1.8/xmpp4r/streamparser.rb:39:in parse' /usr/lib/ruby/1.8/xmpp4r/stream.rb:75:instart' /usr/lib/ruby/1.8/xmpp4r/stream.rb:72:in initialize' /usr/lib/ruby/1.8/xmpp4r/stream.rb:72:innew' /usr/lib/ruby/1.8/xmpp4r/stream.rb:72:in start' /usr/lib/ruby/1.8/xmpp4r/connection.rb:102:instart' /usr/lib/ruby/1.8/xmpp4r/client.rb:86:in start' /usr/lib/ruby/1.8/xmpp4r/connection.rb:61:inconnect' /usr/lib/ruby/1.8/xmpp4r/client.rb:71:in `connect' main.rb:14

When simplest Jabber client (like at http://dumpz.org/9810/) receives the UTF-8 string which contains Cyrillic (e.g. Russian) characters, xmpp4r fails with REXML::ParseException and won't work anymore.

Backtrace here: http://dumpz.org/9806/

Thanks.

It would be very useful if the developer could access this attributes from the outside in

I has not found method for finding jID by Nick in Jabber conference. Does this method exists?