User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.2.8) Gecko/20100724 Firefox/3.6.8 Build Identifier: Thunar 1.0.2 Using the send-to -> mail recipient. If the filenames contains spaces, those spaces are converted to '%20' which thunderbird fails to understand. Reproducible: Always Steps to Reproduce: 1. create a file with spaces in the filename, (eg. "~/docs/my favorite pudding.pdf") 2. right click on file, send to, mail recipient ( using thunderbird ) 3. try sending the email. Actual Results: After step 3 thunderbird shows error: Sending of message failed. Unable to open the temporary file /home/steve/unisa/inf1511-10-s2/assignments%202010/inf1511%20-%20assignment%202.pdf. Check your 'Temporary Directory' setting." Expected Results: Thunderbird should find the file without any hassle.
URIs are escaped, yes. So ' ' is converted to %20. That's simply how URIs work. I think you may have a different problem with your installation. Could something be wrong with your /tmp directory? I'd be surprised if Thunarbird no longer supports URIs...