git log --follow <filename> doesn't follow across 'subtree strategy' merge

When trying to see all history of gitweb using

  $ git log -C -C --raw --abbrev --follow gitweb/gitweb.perl

I have noticed that while it correctly detects renaming 
gitweb/gitweb.cgi to gitweb/gitweb.perl, and follows this rename, it 
cannot get past merge commit 0a8f4f0020cb35095005852c0797f0b90e9ebb74
and follow moving gitweb.cgi to gitweb/gitweb.cgi.

To get full history I have to use

  $ git log -C -C --raw -- gitweb/gitweb.perl gitweb/gitweb.cgi \
                           gitweb.cgi

Adding '--full-history' doesn't help...
-- 
Jakub Narebski
Thorn, Poland
ShadeHawk on #git