Irrelevant revisions in 'svn log' output

Hi,

The following command:

svn log https://svn.apache.org/repos/asf/subversion/branches/gnome-keyring/subversion/bindings/javahl@871338
-r 870558:871338 -g

returns a number of irrelevant revisions (in particular, 870728,
870496, 869828) in the 'main' line of the log, i.e. not as merged
revisions (full command output is attached).
Neither of the below commands return those revisions in the 'main' line:

svn log https://svn.apache.org/repos/asf/subversion/branches/gnome-keyring/subversion/bindings/javahl@871338
-r 870558:871338

svn log https://svn.apache.org/repos/asf/subversion/branches/gnome-keyring/subversion/bindings/javahl@871338
-r 871338:870558 -g

I think this is a server-side problem (server seems to use 1.7.0 SVN
version), but, just in case, I'm using SlikSvn-1.7.1-WIN32 client.

Is this a known bug, or should I raise an issue in the issue tracker for it?

Best regards,
Dmitry Batrak