I am the Kat that Walks By Itself

So, there I was, internetting away (uploading revised images for my Semicolon art, because I'd gotten an idea for improvement while I was falling asleep last night and spent some time today making the new image and wanted to upload it ASAP) and my uploads were all failing with "unknown error" and the uploads would start, stop, reverse, start again...
( cut for technical ramblings )
So to cut a long story short, if you have ethernet-over-power and you have three devices, and two of them are flashing red/green and one is solid red, that means two of them are okay and the solid red one is the problem. Good to know. Hope I remember this for next time.