Fw: moving files/dirs

I just noticed that if I perform an update before the commit it works. Is this a bug?

C:\del\trunk>svn commit . -m ""
Deleting trunk\bar
Adding trunk\bar2
Adding trunk\bar2\bar.txt
Deleting trunk\foo
Adding trunk\foo2
Adding trunk\foo2\foo.txt
svn: Commit failed (details follow):
svn: Out of date: '/trunk/bar' in transaction '6'

C:\del\trunk>svn update .
At revision 3.

C:\del\trunk>svn commit . -m ""
Deleting trunk\bar
Adding trunk\bar2
Adding trunk\bar2\bar.txt
Deleting trunk\foo
Adding trunk\foo2
Adding trunk\foo2\foo.txt

Committed revision 4.

C:\del\trunk>dir
 Volume in drive C has no label.
 Volume Serial Number is A001-BD73

 Directory of C:\del\trunk

10/01/2004 04:33 PM <DIR> .
10/01/2004 04:33 PM <DIR> ..
10/01/2004 04:21 PM <DIR> bar2
10/01/2004 04:21 PM <DIR> foo2
               0 File(s) 0 bytes
               4 Dir(s) 9,527,242,752 bytes free
Received on Sat Oct 2 02:05:37 2004