I am using CiviCRM on Wordpress on Ubuntu where the Wordpress comes from a deb package, not from the original source. The only real difference that I know of is that Debian/Ubuntu split the Wordpress code into /usr/share/wordpress for the static PHP files, and /var/lib/wordpress for the content files and uploads.
Anyway, probably because of some weird interaction between the Ubuntu package and CiviCRM, I end up with a whole bunch of resources trying to load from a path that starts with https://mydomain.com/var/lib/wordpress and which creates a 404 error in the webserver log when it tries to access /var/lib/wordpress/var/lib/wordpress on my disk. What has obviously happened is that part of the filesystem path has accidentally been embedded into the URL for the resource.
Problem is, I'm not sure where that setting comes from or how to change it. Can anyone verify this, or is it really just me? Should I report this as a bug against the Ubuntu package maybe? Among the resources that have the wrong path are: