Cautionary personal anecdote: DAVx5 has a nasty habit of completely hosing my entire contacts list, even when I wasn't using it in the foreground. It was even m

Cautionary personal anecdote: DAVx5 has a nasty habit of completely hosing my entire contacts list, even when I wasn't using it in the foreground. It was even more insidious because several times this happened while I was actively using other apps that also interact with the contacts in my phone (e.g. k9 mail client), causing me to dump troubleshooting effort into several different red herrings. Since I do not "sync" my contacts to any third parties, I had to keep re-importing my contacts from a local contacts file until I was finally able to pin the problem to DAVx5.