Xfdesktop not starting

[Nick Wales]

I'm a new user of xfce, and have been trying to make it look how I
wanted. Nothing dramatic, but xfdesktop seemingly enough to make it go
awry. I've changed the theme, font and icons around. Which worked fine
for a while, but now whatever i choose i get the below message when
running xfdesktop manually. (It fails at startup) So i'm left with a
completely useable OS but with nothing on the desktop. Just the menu
bar. Whatever theme i choose i get the same thing. But if I choose
console for the font the Pango warning goes. 

Any ideas on how to fix this?

Thanks

Nick

** (xfdesktop:4361): WARNING **: Unable to initialise D-Bus.  Some
xfdesktop features may be unavailable.

(xfdesktop:4361): Pango-WARNING **: shape engine failure, expect ugly
output. the offending font is 'DejaVu LGC Sans Not-Rotated 0'
Segmentation fault