svn ls on a deleted directory

I'm having trouble running svn ls on an old revision of a directory
that I deleted and recreated:

[bloom_at_little-cat-a assignment1]$ svn ls -r2980 svn://server/path/to/iris/
assignment1/
assignment2/
assignment3/
assignment4/
sample/

[bloom_at_little-cat-a assignment1]$ svn ls -r2980 svn://server/path/to/iris/assignment1
svn: Unable to find repository location for 'svn://server/path/to/iris/assignment1' in revision 2980

The directory in question was deleted in -r2990 and created fresh in
-r2991 as I brought in code that I had been trying out elsewhere. Now
I can't go back and look at the old code.

Is this a known bug? Anybody else seeing this?

[bloom@little-cat-a assignment1]$ svn --version
svn, version 1.4.0 (r21228)
   compiled Sep 13 2006, 09:04:00

--Ken Bloom

-- 
Ken Bloom. PhD candidate. Linguistic Cognition Laboratory.
Department of Computer Science. Illinois Institute of Technology.
http://www.iit.edu/~kbloom1/
---------------------------------------------------------------------
To unsubscribe, e-mail: users-unsubscribe@subversion.tigris.org
For additional commands, e-mail: users-help@subversion.tigris.org