I haven't looked into this, but I just cvs updated pkgsrc
cd pkgsrc/www/mozilla
make update


and saw the load at 230 with "Cannot fork" errors :) killing it all
and make update'ing again I get the following block repeated forever..

=> Checksum OK for gdk-pixbuf-0.17.0.tar.gz.
===> Extracting for gdk-pixbuf-gnome-0.17.0
===> Required installed package jpeg-6b: jpeg-6b found
===> Required installed package png>=1.2.1: png-1.2.1 found
===> Required installed package tiff>=3.5.4: tiff-3.5.7 found
===> Required installed package gtk+>=1.2.8: gtk+-1.2.10nb2 found
===> Required installed package glib>=1.2.8: glib-1.2.10nb2 found
===> Required installed package pth>=1.4.0: pth-1.4.1 found
===> Required package gdk-pixbuf>=0.11.0nb1: NOT found
===> Verifying update for ../../graphics/gdk-pixbuf
===> Resuming update for gdk-pixbuf-0.17.0
===> Installing in graphics/gdk-pixbuf-gnome


Cheers,

Patrick