Khuxan said:Page 176 of the DMG: "See "Bonuses and Penalties" on page XX of the Player's Handbook"
Page 191 of the DMG: "Refer to page XX in Chapter 4 for details of different sorts of doors and portcullises"
That's all in the three core rulebooks (I think).
Not too many, but still: surely it's an error that is laughably easy to catch. Just search the proofs for XX... it would take, what, half a minute max?
Yep, those you listed do indeed appear in the print version.
Allen