How to migrate contacts/calendars

[Johannes Graumann]

Hi,

After havin sucessfully setup a fresh 2.2-rc3 system, I'm experimenting with how
to transfer my 2.1 data over to it. mailboxes are easy (mbox), but when
transfering contacts I for example loos all custom categories I defined for them
*no matter whether using vcards or ldif ...). Can anyone advisse how to do this?

Also: what's the best way to migrate calendar/ttask entries?

Thanks, Joh