Comment # 7 on bug 1078811 from Wolfgang Bauer

(In reply to Mark Petersen from comment #6)
> Yes, I had selected a .png file. I now tried it with a .jpg and the print
> options are available. If I select the same .png file after selecting a .jpg
> then the print options are available. Same behavior each time I restart
> gwenview.

Interesting.
And I am able to reproduce this now.
Actually it happens with a .jpg file selected too (when it is selected before
you open the menu the first time) or anything else. Changing the selection
seems to fix the broken state.
Strange that I didn't see this previously, when I tried to reproduce... :-/

Sounds more like an upstream problem then though.

At least you have a workaround for now... ;-)