I think I have the privileges setup accordingly... I've been able to connect to the database just fine with the php web-app running on servers at various locations (my testing server as well, an off-site mirror as well as their in-house server)

==== mySql User Privileges Table =====
User Host Password Global privileges 1 Grant

Any % No USAGE No
Any localhost No USAGE No
pma localhost No USAGE No
root localhost Yes ALL PRIVILEGES Yes
dbusr01 % No ALL PRIVILEGES Yes
dbusr01 localhost No ALL PRIVILEGES Yes

I've also tried setting up a password for dbusr01, and it still doesn't want to work.