Quiztime
First, a wrap-up of the last Quiztime. For an excellent explanation of the issue, read this comment. Also note that this is not the most nice way to do plugins with C++, it’s a boiled down piece of code I debugged.
Shotwell
I’m not sure if there is some confusion about the current development model of Shotwell. I noticed that some distributions seem to try to pick up the current development branch (0.25.x). I strongly advise against that at this point in time. It has just seen a major change in the Menu handling code and might still have severe usability regressions.
While I appreciate any testing of the code, I would really not have the current unstable version of Shotwell stuck in a released distribution. If you want to try those releases on Ubuntu, there is an unstable PPA available.
So to sum up: Shotwell follows the “traditional” version scheme of “Odd is unstable, even is stable” and roughly tries to stick to the GNOME release schedule.
Eh, anyone using Shotwell should be used to instability. In terms of functionality and UI, it’s a great piece of software – but as long as I’ve been using it, it’s had serious stability issues… it’s probably no less than 50% chance of it crashing on any given editing session.
Did you file bugs for your crashes?