I was playing today doing some mining and got blown up by a creeper today and lost all my stuff, no biggie. A few hours later i had finally rebuilt all my gear. Then i was walking around in the twilight in a field when I fell in a ravine and died. I made it back in under 4 minutes but my stuff was gone. Some people said it might have been clear lag, if so there should be a longer duration in between the clear lags, or enable openblock graves as they would help loads.
We can't enable graves because feed the beast changed the ID of the grave to 0 because the disable option is broken.