When connecting with an enterprise user or using Radius to authenticate the password, an "ORA-01017: invalid username/password; logon denied" is received.
Toad is forcing passwords entered to upper case. Since passwords are case sensitive, when it tries to authenticate the password in the OID it does not match unless the password was originally all caps.
WORKAROUND #1:
1.Leave the password field blank and click connect.
2. Enter the password in the box that pops up and click connect.
WORKAROUND #2:
Change the password in the OID to all caps.
WORKAROUND #3:
Downgrade to Toad 8.6.1.
STATUS:
Issue fixed in version 9.1.0.62. The latest version of Toad for Oracle can be downloaded here.