MATLAB: Very weird bug(?) on latex interpreter

figurelabel;

I include a code snippet which colors underneath a sine curve. There is a ylabel with the latex interpreter turned on. Changing the number of patches (from N = 100 to N = 1000) seems to affect the resolution of the axis label. Does anybody know what's going on? Please see the images below for the good label and the messed up one:
http://img406.imageshack.us/img406/6758/screenshot20111109at101m.png http://img854.imageshack.us/img854/8816/screenshot20111109at101a.png
The code is
figure(1); 
clf(1);
N = 100;
x = linspace(0, 2*pi, N);
f = sin(x);
g = 0*f;
verts = [x(:), f(:); x(:) g(:)];
q = (1:N-1)';
faces = [q, q+1, q+N+1, q+N];
p = patch('Faces', faces, 'Vertices', verts, ...
          'FaceVertexCData', [f(:); f(:)], ...
          'FaceColor', 'interp', 'EdgeColor', 'none');
ylabel(['$N = ' num2str(N) '$'], 'FontSize', 18, 'interpreter', 'latex');

Best Answer

This is a problem with your OpenGL-driver. For large data sets the renderer is automatically set to OpenGL, but with Painters the graphics are ok. If you set the renderer manually, it is not changed automatically:
figure('Renderer', 'Painters');
...
The problems for OpenGL might be solved by updating the driver of the graphics card, or by using a software renderer:
opengl software
For more details see help opengl.
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