[BUG?] gitk assumes initial commit is empty

I was looking at gitk display for git itself, and scrolling all the way
down to initial commit show this:

Author: Linus Torvalds [off-list ref]  2005-04-08 00:13:13
Committer: Linus Torvalds [off-list ref]  2005-04-08 00:13:13
Child:  8bc9a0c769ac1df7820f2dbf8f7b7d64835e3c68 (Add copyright notices.)

    Initial revision of "git", the information manager from hell

with no files added or modified. But e.g. 'git show' shows that files
were added in the initial commit:

$ git show e83c5163316f89bfbde7d9ab23ca2e25604af290 --stat
Author: Linus Torvalds [off-list ref]
Date:   Thu Apr 7 15:13:13 2005 -0700
...
   11 files changed, 1244 insertions(+), 0 deletions(-)

In gitk, the next commit shows changes to some files, like if they existed
in the parent commit. So it seems that gitk assumes that initial commit
is empty, which doesn't have to be true.

This is with gitk from master.

-
Zbyszek