running Manjaro since october and no problems until today when trying to update using pacman.
I get ssl errors, example:
sudo pacman -Syu
[sudo] wachtwoord voor rene:
:: Pakket-databases synchroniseren...
fout:kan het bestand 'core.db' niet ophalen van mirror.atysleaks.org : SSL certificate problem: self signed certificate
Is this a serious problem? For now I choose not to update.
The command pacman-mirrors --status should report the same info.
Run pacman-mirrors -c COUNTRY,COUNTRY or as @moson indicated, pacman-mirrors --geoip on a regular basis to make sure your custom pool of mirrors is up-to-date.