Hi,
I posted this last night, but it was lost due to the crash.
I've noticed something strange about the Dungeon Keeper prototypes available here; On the first one, the tooltips don't seem to work properly in low-res mode. I'm sure I've seen screenshots in reviews that use what appears to be an even earlier prototype, and they appear to work fine there. Also, it appears to use the final version of text.dat, whereas the second prototype uses an earlier version.
The second prototype's .exe file's last modified date does not match the build date in it.
Do prototypes sometimes get tampered with?