I'm having a bizarre set of problems with ZC. ZQ is fine. This hasn't always been this way, even on my new Win8 machine.
1. If I start ZC from ZCManager (in standalone mode), it will try to open fullscreen, and toggle between a full-screen window (?!) and being invisible and never start the quest.
2. If I start ZC from ZLaunch, it will start in 2x resolution with default keys and the MIDI patch bug fix disabled. Manually editing ag.cfg does not help.
I'm using the latest version of ZC (2.50.1).