ive been trying to change the size and font of my comment texts, but i cant figure it out, i thought it was blacktext12, but that doesnt work.

blacktext12 is for dates. If you want to change comment text you change all text in general:

CODE

body,table, td, li, p, div, textarea  
{font:normal 9px arial; color:######; font-weight:none; border:0px; text-transform: none; line-height:12px;}