the memory leak is real and still ongoing, today (22 April 2016) I had to reboot my machine because ekrn was occupying 800MB of memory
I changed options to try pre-release updates
Update (23 April 2016):
I tend to browse the internet looking for things to download, then queue them up in flashget for downloading. This morning I did that, 642 files 1,020MB, ekrn.exe memory usage went from ~132,000kB to ~451,000kB
Then I added flashget to the "Excluded applications" in "Protocol Filtering"
This afternoon 638 files 942MB, ekrn.exe memory usage didn't increase at all.