From what i can remeber, there was no changes in the font size, so the symbols proir to the 7k.  I can remeber checking the very first one (]) but the rest i can't remeber if i checked, but seeing that i checked the 7k one too, it makes sense that i might have been checking all along.
just as a recap
date		symbol		ascii value	special
  January   5 2002         ]		          93
  January  13 2002	   _		     95
  January  18 2002	   |		    124
  January  24 2002         +		     43
  January  31 2002        7k				  font size -7
  February  6 2002    degree symbol			  font size  4
  February 11 2002        lux				  font size -3
sorry the table doesn't want to play nice...
-ROss