For some reason, The October 06, 2008 fill up can not calculate the km, or the l/100km. Usually this only happens if I haven't completely filled the tank, but this one, and the fill ups around that, don't have that box checked.
Looks like you have some problems with your data. On October 6th, your odometer reading was 277267. On September 6th, your odometer reading was 277267--exactly the same. So Fuelly isn't sure what to do with that information. It can't calculate a difference in miles, because according to the data you didn't go anywhere.
So if you clean up some of those duplicate readings things should sort themselves out.
Hmm, there is two entries for September 6th, neither of which I filled up on. I filled up on Sept 5th and Sept 9th. For Some reason my October 6th fill got entered twice into september. It was probably my error.