Can't commit multiple externals with depth infinity

One of our software developers recently noticed that he can't commit to
more than one external directory at a time without receiving error
messages like this:

    svn: Commit failed (details follow):
    svn: Repository UUID '314aa19e-ec00-11dd-9c11-f1d07231084f' doesn't
         match expected UUID '314d93e0-ec00-11dd-9ddd-77ee003c9ea6'

Commits to multiple externals worked up through SVN version 1.4.2, but
there seems to have been a change in behavior somewhere between 1.4.2
and 1.5.2. These commits still fail in version 1.5.5.

I found that this issue was discussed in this list last July:

http://subversion.tigris.org/ds/viewMessage.do?dsMessageId=49898&dsForumId=462

But it's not clear from the discussion whether the change from version
1.4.2 should be considered a bug fix or a bug. If it's a bug, I don't
find any bug report filed.

I'm attaching a little script that demonstrates the problem.

Any insights much appreciated.

-- 
Warren Jones
Fluke Corporation
------------------------------------------------------
http://subversion.tigris.org/ds/viewMessage.do?dsForumId=462&dsMessageId=1056425