Jitsi Team/Web Maintainer and Arch Linux users,
The current links for stable and nightly builds for Arch Linux on the Jitsi download page have now been superceded. The current links for the Arch User Repository are:
https://aur.archlinux.org/packages/jitsi/ – Jitsi 2.6
https://aur.archlinux.org/packages/jitsi-nightly – nightly builds, obviously :-0
One note: I have neither tried the Arch nightly nor been in touch with the maintainer, but the last changes to the package build were for the 2.5 nightly builds, so I cannot guarantee that the package still works.