Nabi problem with pixmap Debian8

Hello
I've just installed Debian Jessie and 'apt-get install nabi' to get my Korean (Hangeul) input. This has never been a problem before but this time I get the following when I run nabi;

(nabi:1736): Gtk-WARNING **: Unable to locate theme engine in module_path: "pixmap",

and no Hangeul input...

Any ideas on how to approach this problem? I know nothing about this and googling has proved a waste of time (maybe can't see the trees for the wood....)

Cheers

James