I evolved to 1.6 beta and I tried to resume some old partial files (downloaded with 1.5.0.0). One of them is very popular and I found more than 30 hosts but Gnuke beta told me that most of them were remotely canceled. I had to go back to version 1.5.0.0 and Gnuke resumed my old partial.

And so I made a little experiment: I evolved again to beta and I downloaded a file from a single host. Then I closed the application and I created a false chunk in the Chunks directory. I restarted Gnuke and it resumed the file!

So I think that when you try to resume a partial between sessions, the beta looks for the chunks associated with that partial and if it doesn't find any chunk it gives you the message "remotely canceled".