svnsync UTF8 problem

Hi,

I'm using svnsync to mirror a repository and am doing the initial
synchronization, when I get the following error:

Transmitting file data .svnsync: At least one property change failed;
repository is unchanged
svnsync: Error setting property 'log':
Could not execute PROPPATCH.Error setting property 'author':
Attempted DAV:set operation could not be completed due to other errors.Error
setting property 'date':
Attempted DAV:set operation could not be completed due to other errors.

On the mirror side, I get the following from the Apache logs:

[Wed Oct 05 09:46:47 2011] [error] [client 192.168.1.11] Could not execute
PROPPATCH. [500, #206]
[Wed Oct 05 09:46:47 2011] [error] [client 192.168.1.11] Cannot accept
'svn:log' property because it is not encoded in UTF-8 [500, #125005]
[Wed Oct 05 09:46:47 2011] [error] [client 192.168.1.11] Attempted DAV:set
operation could not be completed due to other errors. [424, #0]
[Wed Oct 05 09:46:47 2011] [error] [client 192.168.1.11] Attempted DAV:set
operation could not be completed due to other errors. [424, #0]

I've tried converting the 'svn:log' property to UTF8 and syncing as
described at:

https://help.codesion.com/View.jsp?title=How-to-Deal-with-Svn-Backups-Failing-Due-to-UTF8-Error&procId=fc29d38015b4321e01b645a2e02ae5e9

but still end up getting the same error. I've also tried deleting the
'svn:log' property altogether using 'propdel', but to my surprise, I still
get the same error.

The actual value of the svn:log property is:

"When printing a form through the full task list the client's TEF number has
<B> and </B> beside it (for cds)."

Which doesn't have any characters that should need any UTF8 handling.

Has anyone else had this problem? If so, how did you solve it?

The version of both of the subversion source and mirror are 1.6.11 and the
command line tools are also this version.

Thank you

-- 
Srdan Dukic