Up until today, I have had no problems with AUR and git. Now, when running git cloneaur@aur.archlinux.org/pkgname.git"> ssh://aur@aur.archlinux.org/pkgname.git for any of my own packages, I keep receiving the following:

aur@aur.archlinux.org: Permission denied (publickey).
fatal: Could not read from remote repository.

Please make sure you have the correct access rights
and the repository exists.

ssh -v aur@aur.archlinux.org reports no errors, but ends in "aur@aur.archlinux.org: Permission denied (publickey)."

I have three completely different Linux flavours on three separate machines, none of them has been modified as far SSH is concerned (the keys match my account, etc.), but the behaviour is the same on all of them.