Inkscape 0.46_5 Segmentation fault on FreeBSD 7.1 AMD64

inkscape
Xlib: extension "Generic Event Extension" missing on display ":0.0".
Xlib: extension "Generic Event Extension" missing on display ":0.0".
Xlib: extension "Generic Event Extension" missing on display ":0.0".
Xlib: extension "Generic Event Extension" missing on display ":0.0".
Xlib: extension "Generic Event Extension" missing on display ":0.0".
Xlib: extension "Generic Event Extension" missing on display ":0.0".

When i draw a square (F4) draw a gradient (Ctrl+F1) in that square and press
F1 (object tool) the square is selected do Ctrl+z (undo, go back in history)
then i get this error message:

Emergency save activated!

Emergency save document locations:
  New document 1.2009_05_12_23_34_08.0
Emergency save completed. Inkscape will close now.
If you can reproduce this crash, please file a bug at www.inkscape.org
with a detailed description of the steps leading to the crash, so we can fix
it.
Segmentation fault

i have this same error message on 0.46_4 0.46_3 and 0.46-devel (may 12 2009).

And i have this same error message when i draw a ellipse (F5) go to menu
Object and then Fill and Stroke (Shift+Ctrl+F) press on no paint (X) and
press Radical gradient and then i press Fiat Color or one of the other
selections after that inkscape flips out of memory and i got the same error
message with "Segmentation fault" in the shell console.

I downloaded 0.46_5 version as package and the 0.46-devel version i have
compiled myself on this machine i got often the warning message:
warning: missing sentinel in function call

npix