The discussion addresses issues with the 'MaxHeadSize' property in the quivergroup function in MATLAB 7.1, highlighting that it does not function as expected. Users confirm that the property cannot be set using the SET command due to a known bug. Additionally, attempts to apply a workaround by including 'MaxHeadSize' in the quiver input arguments have also failed. Participants are seeking insights or solutions to this persistent problem. The conversation underscores the limitations of the quivergroup property in this specific MATLAB version.