Light halos and blurry images

Oh dear, that does not look good. There was actually a similar thread last August Blurry green image - Request Help - OpenFlexure Forum which was after when we had the 2.10.0beta, so the old green problem from v2.9 should have gone away.

@r.w.bowman, could this be previous calibrations not being wiped properly? does disable flat-field correction wipe everything including exposure?