Fontconfig warning: “/etc/fonts/conf.d/50-user.conf”, line 9: reading configurations from ~/.fonts.conf is deprecated.

mkdir ~/.config/fontconfig ; mv -i ~/.fonts.conf ~/.config/fontconfig/fonts.conf

Hidden wifi network kubuntu unable to connect

for this bug see the solutions here
http://bugs.kde.org/show_bug.cgi?id=209464#c21

Natty User Management : “The service ‘User Management’ does not provide an interface ‘KCModule’with keyword ‘userconfig/userconfig.py’”

Like said here

Edit this file:

kdesudo kate /usr/share/pyshared/PyQt4/uic/uiparser.py

press CTRL F  to find this line

bg_name = bg_i18n.string

Replace with

bg_name = str(bg_i18n)