AMI fails to parse events if colon is contained anywhere in data

My dialplan does three actions in a row:

UserEvent(Conference!aaa+bbb);
UserEvent(Conference!aaa:ccc);
UserEvent(Conference!aaa!ddd);

(note the only difference is a character between 'aaa' and 'bbb'. I make telnet connection to AMI port and see all three events coming through:

...
Event: UserEvent
Privilege: user,all
UserEvent: Conference!aaa+bbb
...
Event: UserEvent
Privilege: user,all
UserEvent: Conference!aaa:ccc
...
Event: UserEvent
Privilege: user,all
UserEvent: Conference!aaa!ddd
 ...

However simple event-dumping application usign Adhearsion like this:

...

require 'adhearsion/events_support'
Adhearsion::Events.framework_theatre.start!
Adhearsion::Events.register_callback %w[asterisk manager_interface] do |event|
  puts event.inspect
end

will output:

#<Adhearsion::VoIP::Asterisk::Manager::ManagerInterfaceEvent:0xb7e75510 @headers={"AppData"=>"Conference!aaa+bbb", "Channel"=>"SIP/1001-0a3ac008", "Context"=>"default", "Uniqueid"=>"1257609700.14202", "Application"=>"UserEvent", "Privilege"=>"call,all", "Priority"=>"1", "Extension"=>"111"}, @name="Newexten">
#<Adhearsion::VoIP::Asterisk::Manager::ManagerInterfaceEvent:0xb7e73e54 @headers={"Privilege"=>"user,all", "UserEvent"=>"Conference!aaa+bbb"}, @name="UserEvent">
#<Adhearsion::VoIP::Asterisk::Manager::ManagerInterfaceEvent:0xb7e72b44 @headers={"AppData: Conference!aaa"=>"ccc", "Channel"=>"SIP/1001-0a3ac008", "Context"=>"default", "Uniqueid"=>"1257609700.14202", "Application"=>"UserEvent", "Privilege"=>"call,all", "Priority"=>"2", "Extension"=>"111"}, @name="Newexten">
#<Adhearsion::VoIP::Asterisk::Manager::ManagerInterfaceEvent:0xb7e7180c @headers={"UserEvent: Conference!aaa"=>"ccc", "Privilege"=>"user,all"}, @name="UserEvent">
#<Adhearsion::VoIP::Asterisk::Manager::ManagerInterfaceEvent:0xb7e6f3a4 @headers={"AppData"=>"Conference!aaa!ddd", "Channel"=>"SIP/1001-0a3ac008", "Context"=>"default", "Uniqueid"=>"1257609700.14202", "Application"=>"UserEvent", "Privilege"=>"call,all", "Priority"=>"3", "Extension"=>"111"}, @name="Newexten">
#<Adhearsion::VoIP::Asterisk::Manager::ManagerInterfaceEvent:0xb7e6af20 @headers={"Privilege"=>"user,all", "UserEvent"=>"Conference!aaa!ddd"}, @name="UserEvent">
#<Adhearsion::VoIP::Asterisk::Manager::ManagerInterfaceEvent:0xb7e667e0 @headers={"Cause-txt"=>"Unknown", "Cause"=>"0", "Channel"=>"SIP/1001-0a3ac008", "Uniqueid"=>"1257609700.14202", "Privilege"=>"call,all"}, @name="Hangup">

As you see, unlike the first Newexten event which got

"AppData"=>"Conference!aaa+bbb"

the second one yielded

"AppData: Conference!aaa"=>"ccc"

which is totally wrong. I believe this is because a bug in the parser - it thinks that colon ia a valid character for the parameter name so it uses something like regexp

  /^.+:.*/

to parse while it should use something like

  /^[^:]+:.*/

instead.