I was interrupted by a 5 year old that was hit in the face by a fast moving knee.... lots of blood and crying.... until I cleaned up the blood and introduced ice cream into the equation.
I can test with nautilus providing I have an FTP server to which I can connect. So, if you know of an FTP server to which I can connect, I may be able to test using Fedora (assuming that my associations are properly set).
My reading of the bug is as follows:
(1) Connect to the FTP server using Nautilus. I have never done this and did not even know that I could do this, but, my guess is that this makes the file appear to be available from the regular file system.
(2) User then double clicks on the file, which would be using file associations to use LO to open a Calc file.
Something goes awry with the double click, but it works using File | Open and then selecting the file.