It can't be related to Gnome 3, Ghemical is based on gtk2. More, I can build ghemical-3.0.0 from sources on debian sid and it runs like a charm.
It can't be related to Gnome 3, Ghemical is based on gtk2. More, I can build ghemical-3.0.0 from sources on debian sid and it runs like a charm.