gEDA: Dirt old bug in PCB

[spe <spe-at-NOSPAMstacken_dot_kth_dot_se>]

Hello!

I have received a bug report for gerbv. Apperently (an old version of) PCB 
generated soldermasks with a big square over everything. gerbv is a happy 
camper and shows as it should be without this big square. Which 
unfortunate is wrong.

Before I dive into 2564 lines of gerber code I wonder if any of the 
PCB-hackers (or anyone basically) knows what I am talking about? Where is 
the "square" coming from, ie what gerber code generates it?

The bugreport is in the Debian bug report system at 
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=272717
I will put it in gerbv bug system "any day now".

Best regards,
/spe