Comment 21 for bug 658055

Using the shortcut for the same action:

(inkscape:14323): glibmm-CRITICAL **:
unhandled exception (type Glib::Error) in signal handler:
domain: gtk-icon-theme-error-quark
code : 0
what : Icon 'gtk-properties' not present in theme

and you notice that the root of the issue is that gtk-properties (or any gtk- icon) is not present on the Oxygen iconset either on the oxygen-icon-theme-complete package.
Since there is no fallback set, it crashes.

Probably the solution should be provided by qtcurve, since it intends to be a mimics the kde style on gtk applications. Indeed, it should provide alternative for the gtk- icons.

If I symlink document-properties.png (of oxygem-icon-theme) to gtk-properties.png, inkscape also stops crashing.
Using qtcurve and oxygen iconset.