svn svn returning 'fatal: Not a valid object name' on sourceforge svn repo

> I use git svn often and normally it works fine.
>
> I getting a fatal error trying to clone the asciimathm svn repo at sourceforge:
>
> $ git svn clone --trunk=trunk --branches=branches http://asciimathml.svn.sourceforge.net/svnroot/asciimathml asciimathml-svn-git
> fatal: Not a valid object name
> ls-tree -z  ./: command returned error: 128
>
> Anybody seen this kind of problem before.
>
> A svn co works fine.
>
> I'm using git version 1.6.5.1 on mac os 10.5.8.

>Stephen Bannasch <stephen.bannasch@deanbrook.org> wrote:
>> I use git svn often and normally it works fine.
>>
>> I getting a fatal error trying to clone the asciimathm svn repo at sourceforge:
>>
>> $ git svn clone --trunk=trunk --branches=branches http://asciimathml.svn.sourceforge.net/svnroot/asciimathml asciimathml-svn-git
>> fatal: Not a valid object name
> > ls-tree -z  ./: command returned error: 128
>
>Passing the "-r4:HEAD" parameter to "git svn clone" should work.  It
>looks like the repository was initially miscreated and "trunk" was a
>symlink (and not a directory) in r1.