Gwynn uncovered a bug in the Kiwi SW that has been fixed by John Seamons in Kiwi SW v1.557 which was published this morning (California time).  So if your Kiwis are not set to autoupdate (none or mine are set that way), then you will need to navigate to the Kiwi's /admin-> Updates page and manually start the update process which takes about 30 minutes.

The bug was that GPS corrections were note applied unless there was an active browser session to a listening session or admin page.  So for Kiwis which are mostly or entirely dedicated to WD listening no corrections were applied until a browser connected to them.  For example, I only occasionally looked at my two Maui Kiwis which are entirely dedicated to WSPR listening.  When Gwynn checked the 20M channel yesterday morning it was 30 Hz off on 20M.  That offset immediately went to 0.01 Hz when I opened an /admin page on that Kiwi.

That increased frequency accuracy and stability will make all Kiwi WSPR sites excellent candidates to decode the longer FST4W modes (300/900/1800) on the HF bands.  Perhaps it will also slightly improve the the number and SNRs of WSPR-2 reports. 

Thanks are due to the Gwynn for his excellent diagnostic skills and for John to so quickly publishing a fix