Missing space station!

[MaxwellsDemon]

I checked in at KSP yesterday, intended to download some science from my orbital lab aboard my space station... and the station was gone. I mean really gone-- not deselected in Map view or anything like that. My blood chilled as I wondered briefly if I'd inadvertently wiped it out while cleaning up debris, and I went into the astronaut center to see if the crew were listed as missing. But no-- they were there, hanging out, waiting for their next assignment as if everything was normal. (!)

I began looking through .sfs files to see just when it happened-- haven't gotten it exactly nailed down yet, but I definitely see the VESSEL entry in .sfs files from just a few days ago. Would I be messing anything up if I simply copied the VESSEL block from one of those files and inserted it into a more recent .sfs?

[MaxwellsDemon]

And... now it's UNmissing, without my doing anything. Must be Halloween-related.