svn diff on png files

Hi,

I am using svn 1.7.2 and on doing
"svn diff --diff-cmd -diff abc.png"

i see following output in footer

Property changes on: abc.png
___________________________________________________________________
Added: svn:mime-type
## -0,0 +1 ##
+image/png

But on previous version of svn (atleast till 1.6.17, r1128011) i see its
footer to be in different format as follows

Property changes on: abc.png
___________________________________________________________________
Added: svn:mime-type
   + application/octet-stream

Because of this change some of our scripts which do style checking on
patches are failing.

I have few questions,

1. Why are we seeing this change?
2. Is this some buggy or junk character output?
3. Is there a way we can suppress such meta characters?
4. Should we live with it for ever?
5. If this is buggy, has it been already fixed, if not then what does the

## -0,0 +1 ##
+image/png

  mean?

-Sravan.
Received on 2012-03-02 10:27:49 CET