minefield font (64 bit FF3 build ) ?

[Necuno]

comparing the left minefield to the ie7 - how do i get minefield to have at least same font quality
minefield seem not to have solid lines in its font as ie have?

http://i216.photobucket.com/albums/cc197/RyujiArdae/he.jpg

i guess its do to with true type font ?