Just upgraded to Cyberduck 6.3.1. I have Cyberduck set to automatically download and open a file in my default editor (TextWrangler) after I double click on the filename. After downloading a file once by double-clicking, double-clicking on the file a second time produces the following error:

File not found (MacOS Error code: -43)

This error occurs if I close the open file before attempting to open it again, or if I leave it open. It happens if I make changes to the file or if the file remains unchanged. It also happens if I navigate to a different directory and then return to the original directory. The only way to stop this error is to press the refresh button. So opening a file now means pressing refresh and then clicking on the file every time except the first.

This is a new bug I had not seen before prior to upgrading to 6.3.1.