[NewEnglandLimey]

Having the same problem (silly size messages) with Ubuntu Studio 17. Fortunately the suggested solution (QT_SCALE_FACTOR=1 QT_DEVICE_PIXEL_RATIO=1) works just fine here.

Thanks for the info, Kovid!


I may have spoken a little too soon - Calibre does throw an error on exiting,

Gtk-Message: Failed to load module "atk-bridge"

but this doesn't (so far) appear to affect the operation of the program.