Beginning on  2020-05-07 ,  Marketo  will start to roll out version 159 of the Munchkin  JavaScript  Client.   Subscriptions which have the  Munchkin Beta f lag enabled  will see changes from this release first, after which deployment will begin on a rolling basis to subscriptions which  do not have this flag enabled.    The  most significant change in this re lease is the  deprecation of Munchkin Associate Lead.       Changes     Deprecation of Associate Lead       Beginning with this release, when the  Associate Lead method  is invoked, a warning will be issued to the browser console, indicating that the method will be removed in a future release.  For more details on what to expect from this deprecation  process   read this announcement .     Reversion of Domain Selector V2       Despite best efforts to offer an improved the selection of the domain for the munchkin cookie, the change proved disruptive in certain cases.  We will be reverting the mainlining of this change, and the f unctionality will be  hidden behind a configuration flag  as it was prior to version 158 .     Fixing Undefined Referrer when Calling Visits Web Page       Previously when calling the  Munchkin API to submit a Visits Web Page event , the referrer would be submitted with a value of ‘undefined’.  With version 159, the referrer will now be cor rectly recorded.  This bug did not  affect  normal web visit tracking.       Rollout     As with all Munchkin releases, this version will be a phased rollout,  initiallity  to customers who have enabled  Munchkin Beta  for their subscriptions, and later for all  Marketo  subscriptions.  Th is schedule is subject to change.   Customers who need early access to these features in their subscriptions should consider enabling Munchkin Beta.   Date   Release Type   Percentage   2020-05-07   Beta   10%   2020-05- 21   Beta   50%   2020-0 6-05   Beta   100%   2020-06-19   General Availability   10%   2020-07-10   General Availability   50%   2020-08-04   General Availability   100%     ... View more