~/.config/autostart/stackapplet.desktop, verify that it is the same as this:
Comment=a panel indicator for monitoring StackExchange sites
The problem is likely with the
Exec line, if you used to be using an older version that had a different
Even if they are the same, try removing that file. Then un-check and re-check the
Start Stackapplet during login checkbox.
UPDATE: Looking at your
~/.xsession-errors, StackApplet needs internet access to work. If you aren't connected to the internet right away on login, you'll need to delay StackApplet from starting before you have connected to the internet.
Paste the following in a file called
.stackapplet-start.sh in your home folder:
sleep 30 && python /usr/share/stackapplet/stackapplet.py
Make that file executable:
chmod a+x ~/.stackapplet-start.sh
Now open System -> Preferences -> Startup Applications, edit the
StackApplet entry and change the