I have included qt-components-10 in dependiences so it should be installed with MPGQ.
Nice to hear that it works with 10k images
I can't tell You what's wrong with this error, do you see buttons ? Maybe restart will get everything working.

and sorting, I will make options for sorting, it's usefull option. Details... what is the most information what do you want ? filename ? or you think about other informations like date, which camera itp.

I also noticed that crashing it's not my fault, I started "Extras Gallery" from qtcomponents-examples and minimized it and after some work on phone... it's gone. So it's QML bug or maemo. Can someone test it like me ?