This point is exactly why I know that with the 3.5 PHB, WoTC made changes to the book for later printings.
A player and I were debating a spell use in my game. I totally disagreed with how he believed it worked. So, I read the spell text to him from my PHB. His book was very different. Turned out that there were multiple versions of the PHB at our table and this was part of the misunderstanding over spells that was going on.
As much as I see the value of putting the errata in, there needs to be something clearly marking changes or at least a large version number on the book so we know.