grep colors more than actual match

[Eric Price]

Grep sometimes colors more of the line than the actual match:

$ echo 192.168.1.0 | grep '^[0-9][0-9][0-9]\.' --color
192.168.1.0
^^^^^^^^
colored

The raw control characters of the output are:
^[[01;31m192.^[[00m^[[01;31m168.^[[00m1.1

I'm running grep 2.5.1 on Debian Etch.

Eric