mysql problem after upgrade to 5.0

[Kem Mason]

I'm posting this as an FYI -- for other people who might encounter the
same problem -- I couldn't find any clear instructions on how to resolve
it.

I upgraded from mysql 4.1 to 5.0, at which point 2 different errors
occured:

error while trying to create table customers; Could not load driver
(libmysqlclient.so.14: cannot open shared object file: No such file or
directory - /usr/lib64/site_ruby/1.8/x86_64-linux/mysql.so)

and:
Errno::ENOENT in SearchController#search

No such file or directory - /tmp/mysql.sock

the solution was to install the latest ruby code -- in my case (fedora)

yum upgrade ruby*

did the trick.