17:49:07splittistJust so I remember - I'm seeing a call to medium-clipping-region on nil in the with-sheet-medium form in HANDLE-REPAINT :BEFORE ((sheet always-repaint-background-mixin) region)
17:56:09jackdanielwith-sheet-medium shoud always bind a medium to something that is not nil (either sheet has a permanent medium or it is allocated temporarily - that depends on a mixin)