Disappearing Seabase

[BlazingAngel665]

After the cool new buoyancy got added, it was time for a sojourn to Laythe. As with any good mission, you test it on Kerbin. So a floating base got built.

It was in the water about 1km off the shore of the space center. I then launched my seaplane to test water dockings. Whenever the seaplane gets within 2.3km, the base disappears. Any vehicle that loads the craft causes it to disappear, although I can switch to it from the tracking station with no trouble.

The log says something about "vessel Laythe Base went off rails at 101 atmospheres and was destroyed", it's included below. Let me know if I can provide anything else to help. 

KSP version: 01028

Mac Version, OSX 10.8.5, Macbook Air

 

Imgur Album (for what it's worth): 

persistance file: https://www.dropbox.com/s/uwlk5nnxj4gk6u3/persistent.sfs?dl=0

KSP log: https://www.dropbox.com/s/mbp9118xu95qiax/KSP.log?dl=0

Any suggestions?