nick not registered?

[thufir]

Freenode gives me this message:

Conversation with NickServ on Tue 17 Sep 2013 04:43:10 AM PDT:
(04:43:10 AM) NickServ: (notice) [[thufir]]1 is not a registered nickname.
...
(04:44:07 AM) NickServ: (notice) [[thufir]]1 is not a registered nickname.

However, that's not my nick at all:


thufir at dur:~$ 
thufir at dur:~$ head .purple/accounts.xml 
<?xml version='1.0' encoding='UTF-8' ?>

<account version='1.0'>
	<account>
		<protocol>prpl-irc</protocol>
		<name>[[thufir]]@irc.freenode.net</name>
		<password>*&^$##%@#$^#@</password>
		<alias>thufir</alias>
		<statuses>
			<status type='available' name='Available' 
active='true'>
thufir at dur:~$ 


So, why does Nickserve reply with that error?  I only have the one 
account, also.




thanks,

Thufir