I just found what was causing it here: dropbox, it shipped its own version of libfontconfig. I guess it is the same for the statically linked skype and other programs.
-- "/etc/fonts/conf.d/53-monospace-lcd-filter.conf", line 17: invalid constant used : lcdfilterlegacy https://bugs.launchpad.net/bugs/243130 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs