When I open the popup to process the queue, it processes with no problem. But every time a file changes, the dialog "The <unsuccessful transfer queue> has unresolved errors. Empty the queue to restore normal operation." shows up at the top of every admin page until I do so.
How can I resolve this so it runs properly? Has anyone else run across this? I'm running the latest w3tc.
As an aside, this seems like it would be a good thing. Is there any reason not to enable it?:
Export changed files automatically
Automatically attempt to find and upload changed files.