Hello, I set my kde to theme all gtk2 apps with its own theme which is baghira.

If I run inkscape under this setup and go to Object - Transform inkscape crashes with this

QPixmap: Invalid pixmap parameters
QPainter::begin: Cannot paint null pixmap
QPainter::setPen: Will be reset by begin()
QPainter::setBrush: Will be reset by begin()

Emergency save activated!
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

So it is the fault of my themes and such and maybe being too cutting edge but I also figured out a fix for it

I put this into ~/.inkscape.theme

"include "/usr/share/themes/Mist/gtk-2.0/gtkrc"

style "user-font"
{
        font_name="Arial 12"
}
widget_class "*" style "user-font"

gtk-theme-name="Mist"
gtk-font-name="Arial 12"


and then run inkscape like this

GTK2_RC_FILES=~/.inkscape.theme /usr/bin/inkscape

So inkscape uses the Mist theme and everything works fine!