Description of problem:
The "My Bugs" query URL-encodes the at sign (@) in e-mail addresses, but it
doesn't encode the user name. That's a problem for Sendmail users who use the
"plussed detail" feature to tag e-mail addresses. CGI programs interpret a plus
sign (+) as a space character, so addresses of the form "foo+bar"
become "foo bar" unless properly URL-encoded. Because of that, the
"My Bugs" query fails.

How reproducible:
Every time.

Steps to Reproduce:
1. Create a bugzilla account with a plus sign in the user name.
2. Select the "My Bugs" query.
  
Actual results:
The query fails: "The name 'bradd redhat' is not a valid username.
Either you misspelled it, or the person has not registered for a Bugzilla account."

Expected results:
It should have returned results for <bradd+redhat>.

Additional info:
The same problem occurs on links from "My Front Page."