svn log doesn't show all entries, svn log -ra:b does

Hi, I'm seeing a strangeness on a repo.

[x] refers to the attachment x.

If I run svn log I get [1]

That looks quite normal you might say. Except I'm at revision 14.

If I run svn log -ra:b I get what I wanted, as in [2]
This happens consistantly on this repo, and I think on other repo's I've made.

It's not a big problem, most of the time I've just commited anyway so the revision number is just 1 line up, but it is quite irritating to have to check the revision your at to be able to get the full log.