If you want to use the NM (especially the nm-applet) in Gentoo or ArchLinux, you have to grant the user to access the NM. Therefor you create the following file

# cat /etc/polkit-1/localauthority/50-local.d/org.freedesktop.NetworkManager.pkla 
[nm-applet]
Identity=unix-group:plugdev
Action=org.freedesktop.NetworkManager.*
ResultAny=yes …

Sometimes its necessary/pleasanter to use the Acrobat Reader for some PDF files like forms...

Enable the multilib repository

# cat /etc/pacman.conf
[...]
[multilib]
Include = /etc/pacman.d/mirrorlist
[...]
# pacman -Sy

Install necessary packages

# pacman -S lib32-libxml2 lib32-gtk2 lib32-gdk-pixbuf2

Maybe there are some more packages still missing on your system …

I've found a very nice tool pv ...

$ dd if=/dev/sda1 | pv | dd of=backup.img
359MB 0:00:05 [75.3MB/s] [    <=>                       ]

aka Firefox, DNS lookups and IPv6 (under Arch)

Since my laptop is running with Arch, sometimes my Firefox makes me crazy when i'm trying to open a new page because it show a message like Looking up heise.de... for minutes !

After googling a few seconds i've found someting that …

If you're trying to boot the Archlinux 2010.05 CD/DVD/Netinstall and getting the message

ERROR: boot device didn't show up after 30 seconds ...

try this one to fix the problem

$ udevadm trigger
$ exit