From RHN-Tracker:

Request ID:3564
Requestor:nuwayser@graywolf.ftc.gov              Date Received:08-10-2001
Status:Open                                   Last Transaction:08-10-2001
Subject:RHN Customer Service Request
Request:Data submitted: Fri Aug 10 11:44:16 2001
First_Name: Pete 
Last_Name: Nuwayser
email: nuwayser@graywolf.ftc.gov 
Topic: Trouble using Red Hat Network 

Comment: noticed that I can use an ampersand in my password when I use the
User Info tool on the web; however, rhn_register does not allow ampersands
in the passwords when logging in.