Subversion 1.6.6 doesn't appear to allow adding files with @ in the name

Subject pretty much says it all. My 1.6.4 client does allow adding
files with an @ in their name.

mybox% svnadmin create repo
mybox% svn co repo work
svn: 'repo' does not appear to be a URL
mybox% svn co file:///$PWD/repo work
Checked out revision 0.
mybox% touch work/test_at_file
mybox% svn add work/test_at_file
svn: warning: 'work/test' not found
mybox% svn --version
svn, version 1.6.6 (r40053)
   compiled Dec 2 2009, 14:54:12

Copyright (C) 2000-2009 CollabNet.
Subversion is open source software, see http://subversion.tigris.org/
This product includes software developed by CollabNet
(http://www.Collab.Net/).

The following repository access (RA) modules are available:

* ra_neon : Module for accessing a repository via WebDAV protocol using
* Neon.
  - handles 'http' scheme
  - handles 'https' scheme
* ra_svn : Module for accessing a repository using the svn network
* protocol.
  - with Cyrus SASL authentication
  - handles 'svn' scheme
* ra_local : Module for accessing a repository on local disk.
  - handles 'file' scheme

mybox%

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