I haven't seen crashes so far, but switching to standard rendering means goodbye to TTF since the current renderer doesn't support TTF over OpenGL, and in windowed mode the graphics is blurred. In fullscreen it looks good.
And as for TTF: The current display code is in serious need of upgrading, I really hope Toady will consider opening this part of DF (on linux it's already done...) and we can go with lnxt's rewrite
which has better TTF support, and then separating fonts from graphics could be done in the graphics code, and not in a dfhack plugin.
But even if he does not, we still have this option: If we can agree on a standard tileset for fonts I'm ok with lack of TTF, the cutoff can be annoying, but my preliminary testing didn't uncover anything serious. The possibilities are very good once the tile authors start supporting it, as they'll have much better freedom for creating graphics.
Bugreport: Both Ctrl-S (save macro) and Ctrl-M (browse mechanism dfhack plugin) refreshes the display to use only the font tileset. Changing Z-levels will reset the screen to the desired display. Overall I'm impressed with this, and will upload a new MacNewbie for beta testers.