Due to a mixture of circumstances, both personal and business, we will not be providing support for the open source version of The Events Calendar for a few months. We are well aware that this plugin is having problems with WP 3.0 and will discuss today in our group meeting if and how we can tie it off to be as stable as possible.
Currently our efforts are going towards a new premium version of the plugin (http://codecanyon.net/item/events-calendar-pro-wordpress-premium-plugin/109301?ref=ShanePearlman). We have decided to release an open source version of the premium plugin here that runs about 2-3 versions behind the premium one. While we will be updating the open source plugin, we will not provide support. The cost of support is enormous and is what prompted us to move to a premium model in order to support it. Please note that even with the premium plugin, you are buying as is, through we strongly believe in providing the best support we can knowing this is not our day jobs (yet).
For updates, release information and tips about our wordpress plugins or redmine core ux/ui, follow me on twitter @justlikeair.