All the CRITICAL lines in applet.stderr are troubling, but probably unrelated to any problems with the daemon process.
Try doing this to get debugging output from panflute-daemon:
1. Remove the Panflute applet from the panel.
2. Kill any panflute-daemon processes still running.
3. From a terminal window, run "panflute-daemon -d" to start it in debug mode
4. Re-add the applet to the panel
5. Reproduce the bug
If the daemon is indeed crashing, there should be some output on the terminal window that indicates why.
All the CRITICAL lines in applet.stderr are troubling, but probably unrelated to any problems with the daemon process.
Try doing this to get debugging output from panflute-daemon:
1. Remove the Panflute applet from the panel.
2. Kill any panflute-daemon processes still running.
3. From a terminal window, run "panflute-daemon -d" to start it in debug mode
4. Re-add the applet to the panel
5. Reproduce the bug
If the daemon is indeed crashing, there should be some output on the terminal window that indicates why.