The following code is used to determine the last chunk of data to fetch:

	-- load last chunk
	local lastKey = math.modf(self.last_chunk.count / BLOCK_SIZE)
	if not self.store[lastKey] then
		return lastKey * BLOCK_SIZE, BLOCK_SIZE
	end

This fails if you have a count that is larger than block size (200) and is a multiple of block size.

To reproduce, set your block size to 10 and go to LMA -> Recent Artists, which contains 50 items.  Jive will fetch chunk '0 10' and then try to fetch '50 10' which returns no results and crashes DB.

There will be some number of people out there who have, say, exactly 400 artists and will have a completely broken artists menu.