p55, end of second paragraph: "...8x13 pixels by...", not 8x8.

p79, middle of page: args to glOrtho are wrong...should be
	glOrtho(0.0, 500.0, 0.0. 500.0, -500.0, 500.0)

p87, in problem 2.11: section 2.4 says nothing about scanlines.  this
problem was probably meant to appear *after* problem 2.12, and with a
bit more explanation...

p119, midway down: typo -- glRender, not glRendrer.

p124, the myinit() function: this is different from the code that came
with the book (which actually does the text stuff in the keyboard
handler, and in a different fashion)