Version 4.3.6 - allow synchronization over VPN when the underlying Internet connection can't be validated by Android (→ new VPN setting in DAVx⁵ account settings) - reduce problems with soft errors that caused synchronization to run very often (resulting in battery drain) - hopefully fixes rare migration bug that caused the CalDAV and CardDAV services to vanish on a DAVx⁵ update - [CalDAV] better ignoring of local empty or blank values in events (may cause problems when uploaded) - [CardDAV] improved group support when KIND values are upper-case in vCards - various minor improvements and bug fixes