If you have tried to download the Leica D-Lux 4 Firmware Update and found a broken link instead, this is because Leica is having some problems with it (specifically in the French version).
Leica has posted a tweet about the broken link:
“D-Lux 4 firmware update offline since still containing a bug in French. All other languages OK. New update will come soon, sorry!”
[ Download firmware upgrade (whenever it finally becomes available) at: Leica ]