The current incarnation of this bug is definitely a suspend/resume problem where the setting for middle mouse button emulation is forgotten (the checkbox is still checked, but the emulation doesn't work unless it is unchecked, rechecked, and the settings are saved).
The current incarnation of this bug is definitely a suspend/resume problem where the setting for middle mouse button emulation is forgotten (the checkbox is still checked, but the emulation doesn't work unless it is unchecked, rechecked, and the settings are saved).