Subversion doesn't notice a changed file - possible bug?

Hello,

I have a problem with a particular file, where Subversion seems to think
the file is unchanged even after it has been changed. This means I can't
commit it back. I'd welcome opinions on whether this is a problem with
the tool, or whether it's my setup that's wrong.

The file is a binary file that is two bytes long, 0x01 followed by 0x3F.
It needs to be changed to 0x01 followed by 0x0F. It has properties
'svn:mime-type = application/octet-stream', and 'svn:needs-lock = *'.

If I get the lock and do the edit, then 'svn diff' doesn't notice a
change. Using Tortoise, the overlay icon stays as a green tick too.
However, the Tortoise "check for modifications" command *does* identify
the changed file, but lists 'text status' as 'normal' (where I would
have expected 'modified').

I also tried repeating this with a fresh working copy, just in case the
WC was subtly corrupt.

Command line client 1.4.2 r22196; using Apache server (same version)
with SSPI authentication to access repository.

regards,

--
Jon Ashley
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