Difference: UnixNotes (50 vs. 51)

I had a problem where xdg-open (and all of GNOME) was using Handbrake to open video/mp4 files when I had configured GNOME (using the settings app) and xdg-open (using xdg-mime) to use VLC. It turns out that xdg-open delegates to gvfs-open in a GNOME environment, and for some reason gvfs-open didn't respect what I had done in the settings app. gvfs-mime is supposed to allow you to set the preferences, but they didn't "stick". In the end I had to strace gvfs_mime to see what files it was reading, and then hand-edit ~/.local/share/applications/mimeapps.list. There's a section called [Added Associations] that seems to have precedence over [Default Applications]. When I removed ghb from the added associations gvfs-mime started being willing to use vlc to open videos.