Checksum mismatch on rep 'b'

After a commit failed (don't know why), further attempts to commit give:

Sending Events-2005
Transmitting file data .svn: Commit failed (details follow):
svn: Base checksum mismatch on '/Events/Events-2005':
   expected: e13a829ee584b87c9da7687fb39f8ceb
     actual: 069899227f01b8390a240b8c7e180e20

There seems to be a problem with the repository too:

$ svnadmin verify /safe/svn
* Verified revision 0.
* Verified revision 1.
svn: Checksum mismatch on rep 'b':
   expected: 22c100a39fe77fad6b0b3a58fe154650
     actual: 5ff7575cbb03835d2877efc7517a3497

This is a local repository, accessed with file:///safe/svn. There is only
one user (me), checking in updates to a single binary file about once a
week (so not under heavy load). I'm using the plain command-line client.

$ svn --version -q
1.1.4

(Debian/unstable)

Although the repository is very small, I can't send it as it is
confidential. Sorry. This isn't a serious problem itself (I don't need the
history really in this case), but it makes me nervous of using subversion
for other things...

The repository itself is hosted on a smallish crypto-loopback partition,
but there's a fair bit of free space left on it.

-- 
Dr Thomas Leonard		http://rox.sourceforge.net
GPG: 9242 9807 C985 3C07 44A6  8B9A AE07 8280 59A5 3CC1
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