Hack attempt into gentoo git repository or my desktop?

[Tae_kyon]

I'm a bit worried because on doing eix-sync yesterday (I'm using git) a strange thing happened: sync wouldn't go through, and taking a quick look it seemed that there had been no changes to the tree - which, after 24 hours, was unlikely but not impossible. This morning the same thing happened, but on reading the message carefully there was a sentence saying that sync couldn't go through because I had supposedly changed

dev-libs/klibc/Manifest

I deleted this file, and eix-sync then worked normally.

Needless to say I did not change the klibc/Manifest file at any moment. But I'm wondering, how could such a thing happen? A mistake or bug in klibc ebuild? Or a malicious attempt to change the git tree? Or someone hacked into my system (but why change klibc Manifest?)

...
_________________
We shall not cease from exploration. And the end of all our exploring
will be to arrive where we started and know the place for the first time

[Ant P.]

If you really want to be safe, you need to use webrsync-gpg or verify things by hand. sync=git does *not* check the GPG signatures on the tree.