On Wed, 13 May 2015, B.R. wrote:
The problem lied in the /etc/network/interfaces, where my eth0 interface was set up with the 'allow-hotplug' directive. Still wondering why I ever did that...
You very likely did _not_ do that. The Jessie (and Wheezy iirc) installer, otoh, does do that, apparently, by default.
-- These are not the droids you are looking for.