While doing some more research regarding bug #186382, I found it (suddenly) also works using the Ubuntu package. The reason for this is, that the Hue slider in the preferences dialog dropped to zero as taojones mentioned above, which is strange, because I never touched that slider :).
While doing some more research regarding bug #186382, I found it (suddenly) also works using the Ubuntu package. The reason for this is, that the Hue slider in the preferences dialog dropped to zero as taojones mentioned above, which is strange, because I never touched that slider :).