i'm sure i didn't delete him myself, i would never do that
but i believe he had reasons to want to delete or block me...
i'm now back on his list actually, and he's on mine again. i got back on it after we had exchanged some e-mails. but i didn't get a "permission to add" window, is that normal?
by the way, another contact has also disappeared from my list, and I from hers. she also had reason to delete me (she's the sister of one of my favourite movie stars, i don't even know her, it was not nice of me to bother her in that way). she's no longer on my list either, and i haven't deleted her!