I'm the developer of WP Calenader. As you might noticed i could't deliver any updates in the past few months. I was spending a lot of time in building the next version 1.5.0 with some new features and a better handling of timestamps and timezones last summer.
Unfortenatly i got a massive data crash at home, which also destroyed my last backups and unfortenatly i didn't check-in any new file version on the repository.
The last 3 months a was on holiday :) and in military and didn't spend any time rework my lost data :(
I think there are alot of complications in WP 3.3. I will put all my effort in building a new V1.5 without any new features but with alot of bugfixes THIS month.
I hope a can spend more time in maintainance and new features in the future.