On the JIRA issues macro the only thing that displays is an error box that says
Error on line 72: The element type "link" must be terminated by the matching end-tag "</link>".<br/> java.class.io.IOException
Conflunce had that version in by default when we upgraded but I tried installing the plug-in separately to see if that fixed it but the same issue remained.
Confluence 4.4, JIRA-Connector 4.0.5, java version 1.6.0_26