first of all kudos to the developers, I've been running trinity since last week on one of my machines and it has been a pleasant experience! I'm running TDE on an Ubuntu Precise installation, I removed all kde4 packages before installing TDE now I'm having problems making a qt4 application (mendeley pdf organizer) to open folders in konqueror, it opens them in firefox instead. I tried to open folders with xdg-open and it also that uses firefox. I've tried several things, issuing the following as suggested in the Arch Wiki https://wiki.archlinux.org/index.php/Xdg-open $ xdg-mime default kfmclient.desktop inode/directory didn't work I tried setting kfmclient as the application for opening inode/directory in /usr/share/applications/default.list as well as in .local/share/applications/default.list and it didn't work. Eventually I tried installing nautilus, and as I suspected it took possession of xdg, and xdg-open directoryname now uses nautilus, but that's not really what I wanted, I would like that xdg-open uses konqueror any suggestion would be appreciated! Sam