This is a recurrence of bug 805303 and its recurrence bug 1005677. :) The problem, from my experience with those bugs, is in the overlay-scrollbar packages. It arrived in raring with the update to overlay-scrollbar-0.2.16+r359daily12.11.28.1 .
Downgrade the three overlay-scrollbar packages to 0.2.16+r357-0ubuntu1 , and the problem goes away.
Or you can try running calibre with this environment variable:
This is a recurrence of bug 805303 and its recurrence bug 1005677. :) The problem, from my experience with those bugs, is in the overlay-scrollbar packages. It arrived in raring with the update to overlay- scrollbar- 0.2.16+ r359daily12. 11.28.1 .
Downgrade the three overlay-scrollbar packages to 0.2.16+ r357-0ubuntu1 , and the problem goes away.
Or you can try running calibre with this environment variable:
LIBOVERLAY_ SCROLLBAR= 0 calibre