svn info . does not display the latest revision info

SVN: 1.6.6 (r40053) on Windows XP

I'm not sure, whether the current behavior is a bug or feature:
I'm expecting that [snv info .] should display the latest revision info
of all SVN files of my current project.
(I need this info to compile it into my C-source).

However sometimes this works as I'm expecting, sometimes I'm getting
older revision info:

pbs $ svn info changes.txt
Path: changes.txt
Name: changes.txt
URL: https://svn.dlr.de/BELA/Schroedter/PBS/trunk/changes.txt
Repository Root: https://svn.dlr.de/BELA
Repository UUID: 73670ebe-4f08-11dc-8e32-47d8d9b2d134
Revision: 1011
Node Kind: file
Schedule: normal
Last Changed Author: schroedt
Last Changed Rev: 1011
Last Changed Date: 2009-11-30 10:38:45 +0100 (Mo, 30 Nov 2009)
Text Last Updated: 2009-11-30 10:38:46 +0100 (Mo, 30 Nov 2009)
Checksum: 546bb861ea68743e4423d76b8e2fd5ad

pbs $ svn info .
Path: .
URL: https://svn.dlr.de/BELA/Schroedter/PBS/trunk
Repository Root: https://svn.dlr.de/BELA
Repository UUID: 73670ebe-4f08-11dc-8e32-47d8d9b2d134
Revision: 990
Node Kind: directory
Schedule: normal
Last Changed Author: rolf
Last Changed Rev: 710
Last Changed Date: 2009-11-05 10:57:49 +0100 (Do, 05 Nov 2009)

Specifying the Project URL gives the expect result (latest revision):

pbs $ svn info https://svn.dlr.de/BELA/Schroedter/PBS/trunk
Path: trunk
URL: https://svn.dlr.de/BELA/Schroedter/PBS/trunk
Repository Root: https://svn.dlr.de/BELA
Repository UUID: 73670ebe-4f08-11dc-8e32-47d8d9b2d134
Revision: 1011
Node Kind: directory
Last Changed Author: schroedt
Last Changed Rev: 1011
Last Changed Date: 2009-11-30 10:38:45 +0100 (Mo, 30 Nov 2009)

-- 
------------------------------------
Rolf Schroedter
German Aerospace Center
Institute of Planetary Research
D-12489 Berlin, Rutherfordstrasse 2
Tel/Fax:  (+49) (30) 67055-416/384
Email:    Rolf.Schroedter_at_dlr.de
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