Success!! I started from a freshly downloaded image:
1. Gofer it squeaksource: 'NBOpenGL'; package: 'ConfigurationOfNBOpenGL'; load. ConfigurationOfNBOpenGL project lastVersion load. then 2. load NBXLib package from monticello 3. load NBOpengl-X package from monticello 4. changed glXFunctions to glxFunctions in NBGlx 5. changed tahoma font to one I had on my Ubuntu12.04 install 6. changed the path to OpenGL lib to /usr/lib32/nvidia-current/libGL.so Zooming text displayed, as well as another popup window. Time to get reading and then coding. Thankyou all very much for your patience!
