Recently the network manager applet has been crashing immediately after startup and only at startup. It remains stable throughout the rest of the day. How would I begin to discover what the issue is? There must be a general method of attack on a problem like this. Normally I would try running the program from the terminal to see if any error messages are printed but nm-applet does not seem to crash once I restart it.
dmesg. I'd also collect the chipset and driver versions of all your network devices and confirm there are no open bugs in Launchpad for network manager.