I have noticed that config -/+blank doesn't seem to work as intended. If you set config -blank and then save, before logging out, when you log back in, you are reverted back to having blank on.
In save.c load_char_obj locate the following line:
ch->act = multimeb( PLR_BLANK, PLR_COMBINE, PLR_PROMPT, -1 );
ch->act = multimeb( PLR_COMBINE, PLR_PROMPT, -1 );
The default seems to be no blank in the loading and saving of the player files, so changing this corrects the issue.