using fully qualified email address as XMPP username

[Brady J. Frey]

Good afternoon everyone,
We've been slowly migrating our users worldwide off of the Windows 
platform, but had a bit of a problem using our own custom Jabber server 
with Pigin. We have multiple domains, so we use fully qualified email 
addresses as the username, thus:

bob.joe at mydomain.com

...would be the full username. Of course, everytime we do that, Pigin 
pulls the domain out and pops it into the domain field, regardless if 
that field is already full.

Anyone know of a workaround so that I can get an ampersand as part of 
the username? Thank you!

Brady J. Frey