possible bug in gawk 3.1.3

[AccessWest Support]

Hi,

Im reporting a possible bug in gawk 3.1.3

awk behaves unexpectedly when issuing the following
command %awk 'FS = "[\133\135]" {print $2}'
This command is used to print the ip.address in lines of 
text that contains an [ip.address] surrounded by by brackets.

Im perplexed because a similar command can be used to print an
an address@hidden in lines of text that contain an <address@hidden>
surrounded by <>
%awk 'FS = "[\074\076]" {print $2}'

Software Used  gnu awk 3.1.3
Slackware Linux 9.1
gcc 3.2.3

Hope that helps,

Robert Dalton
AccessWest