2.6.25.10-47.fc8
fluxbox-1.0.0-2.fc8

While playing around with fluxbox window manager, (having fun using it) I add a few keyboard shortcuts (below) to the following file:
~/.fluxbox/keys
____________________________________
# Capture area of desktop
#Print :ExecCommand gnome-screenshot
Print :ExecCommand gnome-screenshot

#Capture specific area of desktop
Mod1 Print :ExecCommand ksnapshot -c

#Mod1 Print :ExecCommand "gnome-screenshot --window"
____________________________________

Under Gnome desktop, I have no problems capturing full screen and/or specific windows via gnome-screenshot. Commandline-based, icon, and keyboard key (Prt Scr/Sys Rq) work as expected. Although, when I login to fluxbox or remove metacity ($ gnome-session-remove metacity) then start fluxbox window manager, only full screen print will work via commandline, icon, or keyboard key.

Alt + Print (Prt Scr/Sys Rq) will not work
Via command line I receive a "Segmentation fault" message when issuing "gnome-screenshot --window." As a quick alternative, I installed kdegraphics as this package contained ksnapshot. Ksnapshot works for specific window captures, but I would like to learn why I am receiving this segmentation fault when issuing "gnome-screenshot --window."