Unexpected tree conflict when deleting directory

Hi,

I'm experiencing a tree conflict in a situation where there should be no
conflict. Basically, after removing the contents of a directory I'm
unable to commit deleting the directory even though no one has modified
it. The client is 1.6.6. I've tried with server versions 1.4.3 and
1.6.9. Below is a simple demonstration

$ mkdir foo
$ svn add foo/
A foo
$ svn commit -m "Add dir foo"
Adding foo

Committed revision 1738.
$ echo 'Hello World' > foo/bar
$ svn add foo/bar
A foo/bar
$ svn commit -m "Add file bar in dir foo"
Adding foo/bar
Transmitting file data .
Committed revision 1739.
$ svn rm foo/bar
D foo/bar
$ svn commit -m "Remove file bar from dir foo"
Deleting foo/bar

Committed revision 1740.
$ svn rm foo/
D foo
$ svn commit -m "Remove directory foo"
Deleting foo
svn: Commit failed (details follow):
svn: Item '/puppet/foo' is out of date
$ svn update
   C foo
At revision 1740.
Summary of conflicts:
  Tree conflicts: 1

At this point, I have to use 'svn resolve --accept working foo/' to
accept the deletion. Afterwards, I can successfully commit it. Can
anyone explain this behavior?

-- 
Brian Pitts
Systems Administrator | EuPathDB Bioinformatics Resource Center
706-542-1447 | bdp@uga.edu | http://eupathdb.org