Can't reproduce it with X11 added to Login Items:
1) log out and back in: X11 + xterm start automatically, launching
Inkscape 0.47pre1-2 later works without problem
2) log out, reboot, log in: X11 + xterm start automatically, launching
Inkscape 0.47pre1-2 later works without problem
The process hierarchy looks slightly different (X11 is directly started
by launchd as opposed to being started by Xquartz), but I don't know yet
if that could contribute to your problem.
Does Inkscape 0.47pre1-2 launch & run stable, when you have no X11
running before you start it?
Does the problem as originally described also happen with other (new)
user accounts on your computer?
Can't reproduce it with X11 added to Login Items:
1) log out and back in: X11 + xterm start automatically, launching
Inkscape 0.47pre1-2 later works without problem
2) log out, reboot, log in: X11 + xterm start automatically, launching
Inkscape 0.47pre1-2 later works without problem
The process hierarchy looks slightly different (X11 is directly started
by launchd as opposed to being started by Xquartz), but I don't know yet
if that could contribute to your problem.
Does Inkscape 0.47pre1-2 launch & run stable, when you have no X11
running before you start it?
Does the problem as originally described also happen with other (new)
user accounts on your computer?