Alrighty, I'll do it all on 80m and below. I hope to hear somebody soon!
I thought I was clever enough to do this on my own, but apparently not. Since I might not be the only one with this problem, I'll say it out loud:
Checking /etc/fstab the original size parameter was "size=300m" I've changed this number to 400m, 900m, 1000m, but I'm still getting errors when trying to launch WSPRDaemon that say that my schedule fails validation because I only have 409,600kb of space.
I dropped 80m off the FST4W schedule and WSPRDaemon runs without complaint ... I guess I don't know how to correctly edit /etc/fstab ... it seemed sort of obvious to me that the "size=" parameter would be the one, but apparently not. No rush, but if somebody can set me straight, I'd appreciate it..