keypool: checkblocks memory wasting...

Hi! I tryed frost and it seems to work. So I entusiastically shared 
something as 8.5-9GiB of various files (music); without knowing the risk 
of what I was doing!!! Fortunately, I frequently check the diskspace... 
having started frost, the free-memory begun to fall, and fall...
So I stopped frost to check what was going on. I discovered the keypool 
directory: here I seen hundreds of files, named .checkblocks, that were 
continuously generated by frost. One every my shared file... and 
approximately 50& of original dimension.
This is absurd. To share 10 Gib I should have 5GiB of freespace...!!!
Couldn't these files be created only when the original file is requested???!




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