"The developer" is actually Mark Karpeles (MagicalTux), so I'm fairly confident that this will be resolved.
Do you think that when I wrote to Tibanne Co., Ltd. (throught their contact form
https://www.tibanne.com/contact.html or maybe
contact@tibanne.com), it will escalate to him?
By the sounds of it, your issue already has been escalated to him. He's just really busy, so it might take a few days to get to you.
"Peter support" is a lot better than Danny. He already found out something: (maybe bug?)
Thank you for contacting us.We have check the address 17d9smBHGZ1C6rDotUC6uYKesP43QLhAvE and we are not able to located in the blockchain or this address is not linked to any of our Mt.Gox account and we will check on behalf of this and update you once it resolved.I thought there is some condition:
if (receiving_address_is_a_mtgox_internal_address)
find_account_linked_with_receiving_account
add_btc_to_that_account
else
push_to_blockchain
But it seems a bit buggy...