Strange log results

Hi,

I'm working on converting the KDE subversion repository to git, as
a part of this I'm trying to validate that the conversion hasn't missed
any revisions or merges but when I run "git log" with different options
I get (in my mind) strange results.

git log <file> -> produces a list of commits
git log --follow <file> -> produces an empty list (no output)
git log --name-status <file> -> no info about file

It seems like this occurs when there is a merge only commit as the
first commit in the list returned by the "bare" log command.

Is there any legit situation where this might happen?
If so what?
If not is this a bug in my convert program or in git?

/Regards
Torgny