Here is the fix that one of our developers found. I just checked the latest version of the plugin and it doesn’t seem to be included, so i’ll forward it on to the developer as well.
The problem: the wp post title contains whitespace characters that will break the javascript engine in the browser.
The solution: trim the whitespace in the title!
On line 354 of ec_js.class.php change:
$title = $e->eventTitle;
to:
$title = trim($e->eventTitle);
