I noticed that one of my packages from AUR didn't want to upgrade itself. After a while I noticed that archlinuxfr repository had an older version of the package. For some odd reason I decided it was time to try some other AUR helper and ended up installing pacaur.
The installation was very easy because I had yaourt already installed.
- gpg --recv-keys --keyserver hkp://pgp.mit.edu 1EB2638FF56C0C53
- yaourt -Syua pacaur
- pacaur -Rs yaourt
If you have archlinuxfr repository, it may be wise to remove it.