not showing bump map

[orbiter]

Because of another issue (see Thread regarding Thumb print) I deleted the preference file to allow a new one to be made with defaults. Since then I have not been able to show bump maps at all.

In the View / Show I have show normals selected.
Looking in the prefs.txt file I even have
{show_materials,true}.
{show_normal_maps,true}.

But there is no bumps for love nor money.
I seem to recall something about a shader being seen in the title bar but as its been there all the time I have been using Wings, I have never given it a thought until now. It may have no bearing on this at all.

Any ideas folks