Well it does seem I have a knack for asking obsolete questions,
although I really was stuck with this problem and Google wasn't
helping, it seems a fresh pair of eyes did the trick.
The problem was that it was running in the console subsystem, as
opposed to the GUI windows subsystem. Solved simply by adding the flag
-mwindows to g++.
Thanks for Inkscape anyway. ;)
Kind regards,
Hal