When a friend tried to upload some files via Skype to my PC it kept failing, Skype 22.214.171.124 for Ubuntu complained “can’t write to file” as soon as I accepted the upload.
Here’s the solution:
First, I created a world-writable directory
mkdir /home/nick/skype-uploads chmod 777 /home/nick/skype-uploads
I opened the
File Transfer dialog, clicked the sprocked icon and selected
Change Default Download Directory.... After setting that directory to my fresh
skype-uploads dir uploads worked!