Jira:UI:renderChangeHistoryDetails

Jira may show undigested #renderChangeHistoryDetails() tags in an item's Activity Stream after an upgrade like so:

#renderChangeHistoryDetails is a macro (probably) defined in atlassian-jira/WEB-INF/classes/templates/plugins/jira/issuetabpanels/changehistory_macros.vm.

Copy the macro definitions for renderChangeHistoryDetails and createAuthorLink out of changehistory_macros.vm and into changehistory.vm and restart Jira.