MySQL upgrade 3.23.49-86 broke OSCommerce access

[Mark Gillingham <markgill@uwalumni.com>]

After an upgrade from MySQL 3.23.49-85 to 3.23.49-86 one of my LAMP 
applications broke (OSCommerce) while another one (Moodle) continued 
on. OScommerce is unable to access the database with the 
username/password that it had been using.

MySQL Connection Failed: Can't connect to MySQL server on 
'host.domain.com' (111)

I noticed that the application was using 'root' and a password. I 
attempted to change this to another username and password. I can access 
the database via the mysql client and Webmin, but not with the 
application. Ideas?

Mark