svnserve crash

Background:

A week or so ago, I tried to set up svnserve with sasl authentication
(DIGEST-MD5 & sasldb), which I tried using various binaries of subversion (I
tried TortoiseSVN, CollabNet and Wandisco), to no avail (if you want more
details, see my email on 20/10/2012; basically authentication kept failing
despite credentials being correct). As I had to create the sasldb on Linux
due to a lack of Windows binaries of saslpasswd2, I thought that might be
the problem, so I set about compiling everything from source, which I have
now done. My binaries appear to work, generally; in particular, svnserve
works fine when using inbuilt authentication without sasl.

Problem:

I have svnserve running, using sasl, sasl being set up to use DIGEST-MD5 and
sasldb. When I try to check out the repository, svnserve crashes, producing
the attached log and dump files. The configuration files are good (they work
on Xubuntu, using a sasldb created on Xubuntu with the same parameters I
used on Windows)

Does anyone know what could be the problem causing the crash?

Thanks!