thanks for the report ... we will check and fix it.
On Apr 12, 2013, at 9:18 PM, Graf von Roit zu Hoya <graf.roit(a)gmail.com> wrote:
when an event is changed in CalDAVZap, it "kills" the categorie assigned with
Thunderbird. Don't know, if TB use a inofficial extension DAViCal supports.
Categories assigned in TB are f.e not shown in iOS. But iOS doesn't touch this field
if an event is changed (with iOS).