Version 2.15 of the ircbot plugin is unable to connect to my IRC server. The server requires a password, but no other authentication. Reverting to 2.9 allows the bot to connect. The following appears in the log, repeated ad infinitum:

Aug 31, 2011 1:42:55 PM hudson.plugins.ircbot.v2.IRCConnection connect
INFO: Connecting to irc.myco.com:6667 as hudson using charset UTF-8
Aug 31, 2011 1:42:55 PM hudson.plugins.ircbot.v2.IRCConnection connect
INFO: connected to IRC
Aug 31, 2011 1:42:55 PM hudson.plugins.ircbot.v2.IRCConnection getGroupChat
INFO: Trying to join channel #mychannel
Aug 31, 2011 1:43:25 PM hudson.plugins.im.IMConnectionProvider$ConnectorRunnable run
INFO: Trying to reconnect
Aug 31, 2011 1:43:25 PM hudson.plugins.ircbot.v2.IRCConnection connect
INFO: Connecting to irc.myco.com:6667 as hudson using charset UTF-8
Aug 31, 2011 1:43:25 PM hudson.plugins.ircbot.v2.IRCConnection connect
INFO: connected to IRC
Aug 31, 2011 1:43:25 PM hudson.plugins.ircbot.v2.IRCConnection getGroupChat
INFO: Trying to join channel #mychannel
Aug 31, 2011 1:43:58 PM hudson.plugins.im.IMConnectionProvider$ConnectorRunnable run
INFO: Trying to reconnect