Should arbtt still be working with i3 window manager?

[JOKer]

Hi.
I've read in the release notes of 0.4.1, that arbtt should be/has been
usable with i3:
> In the absence of _NET_CLIENT_LIST, look for application windows as
> children of the root windows. This should work for users of window
> managers like i3 without EWHM support.

If this should still be the case, I'd like to know what I'm doing wrong.
I'm only getting output like this from arbtt-dump:
TimeLogEntry {tlTime = 2012-04-22 22:30:16.254658 UTC, tlRate = 60000,
tlData = CaptureData {cWindows = [], cLastActivity = 581}}
TimeLogEntry {tlTime = 2012-04-22 22:31:16.265074 UTC, tlRate = 60000,
tlData = CaptureData {cWindows = [], cLastActivity = 47}}

If not, is there a way to make it work again (other than hacking EWHM
support into i3)? I'd really like to try this program.

Have a nice day anyway,
JOKer