Openbox Syntax Error

Some people have seen this error on first boot:

One or more XML syntax errors were found while parsing the Openbox configuration files. See stdout for more information. The last error seen was in file "/home/pi/.config/openbox/lxde-pi-rc.xml" line 1, with message: Document is empty

It can typically be resolved by reflashing the card.

One reporter said they booted initially without a monitor connected (maybe related, maybe a coincidence). The issue might be upstream (see this forum post). As far as I’m aware lxde-pi-rc.xml is the same in our image as in the upstream image.