Using same models and print settings between 4.01 and 4.1, there are very noticeable gaps between the start and finish points of outlines/perimeters; there looks to be insufficient extrusion at the beginning of a line. I tried to compensate by reducing retraction & adding extra retraction distance or turning off retraction, but after several attempts (and half a day), the issue persisted. I then printed the same model. using same settings but generated by 4.01 and the problem went away. I then used Cura to slice the model using similar settings and there was no problem so I don't think my Printer or Filament was to blame.