MySQL 3.23.51-r1 required 3.2.3h or 3.2.9a. At the present time installing it with 3.2.9 failed. As 3.2.9 is lated version of sys-libs/db I imagine most user upgrading will have the same problem.
Confirming that this bug still exists as of 200207051000
this is a duplicate of http://bugs.gentoo.org/show_bug.cgi?id=3836
*** This bug has been marked as a duplicate of 3836 ***