Often, when Arch is upgraded, things will be broken. This is a list of ways problems have been solved in the past. Hopefully it will be helpful for solving issues when upgrading in the future.

System

Boot Problems

Once in a while there will be no keyboard input at the login prompt. The cause/fix is currently unknown, but boot debugging might help to find a fix.

WiFi

If wifi does not work after upgrading, try reinstalling broadcom-wl-dkms

# Remove current installation
sudo pacman -R broadcom-wl-dkms

# Install the package again
yaourt broadcom-wl-dkms

# Reload the kernel module
sudo modprobe wl

# Double check that you can see available wifi connections
wifi-menu

Applications

VMWare Workstation

Post Install http://askubuntu.com/questions/689123/vmware-wont-work-after-ubuntu-upgrade

The solution below applies to versions of VMWare prior to 12.1.0. The 12.1.0 version of VMWare does not require this fix.

VMWare and VMPlayer are in fact looking for a specific library string. You can execute VMWare/VMPlayer from the terminal by executing

export LD_LIBRARY_PATH=/usr/lib/vmware/lib/libglibmm-2.4.so.1/:$LD_LIBRARY_PATH

then vmware or vmplayer

I made this a permanent change on my system by executing instead

executing sudo nano /usr/bin/vmware and adding the line

export LD_LIBRARY_PATH=/usr/lib/vmware/lib/libglibmm-2.4.so.1

after the line export PRODUCT_NAME...

Press ctrl+o to save and ctrl+x to exit: VMWare will now work.

To perform the same function for VMPlayer, execute the same changes to /usr/bin/vmplayer