While working in WORD I get this odd line of small black squares .

[Bill]

These squares appear to be some sort of formating and occur from unknown
causes but are nearly impossible to remove. They appear to return when a
hard return is made.

The text can be cut and pasted "above" the offending section but this is
time consuming.

 

[Stefan Blom]

Please see: http://word.mvps.org/faqs/formatting/CantGetRidOfLine.htm.