I guess I should have added - are you talking about special event 1x1 callsigns?
Yes, 1x1 call signs, such as the one I am currently working with, N1D. I have several queries about this posted on WSPR-related forums, and I surmise it may simply turn out to be a flaw in the current client decoder. It is interesting that a 1x1 call sign works fine for uploading spots and sending WSPR transmissions....but only certain (probably very old) clients will DECODE a 1x1 call sign, such as the one built into the KiwiSDR. The simplest workaround may be to use a compound call sign, such as N1D/KD4QHB.
