Error doing a svnsync

We have been doing a few hundred svnsync's from a 1.6.5 repositories
to 1.7.2 repositories

for the most par this has gone quite well. but we have encountered an
error that is not to clear and we seek any insight to this error:

svnsync: E000022: Valid UTF-8 data
(hex: 53 65 72 76 65 72 20 43 75 72 72 65 6e 63 79 20)
followed by invalid UTF-8 sequence
(hex: 96 20 42 61)

-- 
" The fundamental principle here is that the justification for a
physical concept lies exclusively in its clear and unambiguous
relation to the facts that it can be experienced"   AE
Please Feed and Educate the Children... it's the least any of us can do.