I've activated the Events Calendar plug-in v.6.4 in a WordPress MU v.2.6 environment. I'm using a theme that is widget-capable. MySQL is v.5.0.45 and PHP is v.5.2.5.
While the calendar loads quickly in the page, if I have the sidebar set to display it as well, any page that displays the sidebar, takes over 60 seconds [on an ethernet 10/100 connection] to load.
If I disable the events calendar widget, the page loads quickly.
Another symptom occurs on the widget admin page, itself: when it's listed in a sidebar, updating the wigdet admin page also takes over a minute to update. When it's not in the active list, the page updates quickly again.
Would anyone have any idea why the significant slowdown would occur with just the widget, and not the large view in a post?