"svn diff -r N file" in 1.7.14 is broken if svn:mime-type is present

Given the repository svn://scm.gforge.inria.fr/svn/mpfr/misc/vl-tests:

$ svn co $repo
A vl-tests2/mpfrtests.data
A vl-tests2/mpfrtests.sh
A vl-tests2/release-3.1.2-p4
A vl-tests2/release-3.1.0-p8
A vl-tests2/vfy-data
A vl-tests2/ReadMe
Checked out revision 8727.
$ cd vl-tests
$ svn diff -r 8276 ReadMe
Index: ReadMe
===================================================================
Cannot display: file marked as a binary type.
svn: E000022: Valid UTF-8 data
(hex: 73 76 6e 3a 6d 69 6d 65 2d 74 79 70 65 20 3d 20 28 48 67)
followed by invalid UTF-8 sequence
(hex: fb 20 0a 7f)

The actual values reported vary among runs of "svn diff", sometimes
writing garbage characters to the terminal. It appears to only occur
with files that have the svn:mime-type property set.

This works correctly with 1.7.13 and 1.8.5.

Cheers,

-- 
James
GPG Key: 4096R/331BA3DB 2011-12-05 James McCoy <jamessan_at_debian.org>