I like this calendar and have it installed on a couple of client sites. But, the current version is not compatible with WP3.8.1. I also found a curious bug with it last week: when an event is created for one of the last few days of a long month (beyond 4 weeks), the plug-in places it in the first week of the month. I tried to contact support and their site was not working correctly. None of these things are good signs, and I'll be looking for a replacement plug-in.