This is a Javascript issue.
Kunena needs
Mootools 1.2.4
to run. This is also a Rockettheme template issue. Our concern is to make sure that
Kunena works and we do not want
Kunena to cause problems with other Joomla extensions if it can be avoided. But sometimes these things are unavoidable and sometimes problems manifest themselves in many different ways.
You have several choices:
(1) Try disabling the System - Mootools Upgrade plugin (and you'll probably find that it will cause problems for you on the Kunena page - like it will make the BBcode toolbar disappear - but this may make the Rockettheme template behave properly on every page except for the Kunena page.
(2) Apply more pressure on Rockettheme for an answer. You paid for the support, so you should continue to ask for an answer.
(3) Consider an alternative template.
(4) Consider the possibility that the Javascript conflict that you have with your Rockettheme template may not even be caused by
Kunena. It could be another Joomla extension that has loaded a Javascript function that is incompatible with the one needed by your template.
(5) Are there other ways that you can generate the "Read on" link that doesn't involve fancy-looking widgets?