I just installed Revo 2.0.0 on MT gridserver and got the same error message. However it seems to work just fine.
i’ve done two installs of modx 2.0.0-pl on my (gs) now and the install is really easy. there’s a message during the install that says you may not have full functionality because you have mysql 4.1.11, but i have yet to notice anything.
so far loving modx revo on my (gs)! thanks modx team.