The 'calendar' package is currently broken, as a result of major reworkings by Dirk to get it templated.
A templated calendar is fabulous, but a broken calendar is not so fabulous.
There are several things the currently break hard, such as attempting to add a calendar appointment on both PG and Oracle.
And Dirk hasn't developed or tested on Oracle at all, so several Oracle queries are simply missing, etc.
This is a call for a volunteer with the appropriate skills and passion to step up to help fix calendar.
I'll buy you a beer next time you're in Copenhagen :)
Anyone?
/Lars