Bug#689817: same if iceweasel from experimental

[Uli Wannek]

Additional information:

The behaviour is the same (bad text readability) if i install iceweasel
from experimental (instead of sid's):
  # apt-cache policy iceweasel
  iceweasel: 15.0.1-1

My X:
  # apt-cache policy xorg
  xorg:  1:7.7+1 0
  xserver-xorg-video-nouveau:  1:1.0.1-3

My hardware:
  # lspci
  VGA compatible controller:
         NVIDIA Corporation GF108 [Quadro 1000M] (rev a1)