Problem with message "The file ... changed on disk."

[racoon]

Hi,

I am getting the message "The file ... changed on disk." even though I 
just saved the file a minute ago or so and it isn't opened anywhere 
else. My hunch is that it relates to the syncing with Spider Oak. Did 
anyone experience a similar problem or know what's going on?

As a fix I can just click on "Ignore" but it is a bit annoying.

Best,
Daniel