Register at https://safecex.com/
and then the link works to vote to add Magi to the exchange.
http://safecex.com/coin/add?q=XMG

It's free and only takes a few minutes.

I have a problem with : https://chainz.cryptoid.info/xmg/#!rich
If I look at my wallet address the amount is 3600 XMG lower as in my wallet.
How is this possible?

Nice thanks for the update Tittiecoiner and Redrover!
Let's go Magical Magi community vote for Magi there!!

EDIT: Voted

edit magi.conf and allow incoming IP, IP range

daemon=1
server=1
rpcport=8232
rpcallowip=127.0.0.1
rpcallowip=192.168.0.0/24
rpcallowip=192.168.0.*
rpcuser=longandcomplicatedstring
rpcpassword=longeandevenmorecomplicatedstring

 HTTP request failed: Failed to connect to localhost port 8232: Connection refused
json_rpc_call failed, retry after 30 seconds


...

there is the real no instructions anywhere on the Internet? Runs on my debian root server without a display. Or do I have on the same computer to install a wallet? If yes how ?

converting other coins from user balances into btc is mass stealing and over all it will hurt all customers as a whole as exchanged price will be 20-1000% lower than market price because of huge quantity sold(dumped), I haven't checked but some altcoins don't have second exchange, so they worth exactly zero...

Thats why its very good Magi is on 4 different exchanges (and Cryptsy).
This year a lot of altcoins will die but not Magi.
If we (Magi team and awesome community keep on working together Magi will go up further and further.

BTW Magi team is looking for somebody who knows the Chinese markets and speeks the language.
Best thing is somebody from our own community or somebody who likes Magi.
If you are that person contact the team or post something here so Magi can contact you!!!

Today is the sadest day for me since I had a registered Magi address for the Proof of Interest Campaign (which was: 9CEZrQB5oMcG6TfAr74rCT5Fg1sh9UvsR5) but lost all of my coins. I had a backup of the appdata directory which contained the wallet.dat file for the address mentioned above, however when I move those files to my newly restored (installed) PC in the default appdata directory and open the Magi client, it erased the original wallet that I had and it started everything anew. Now it gave me another XMG address but I am afraid that the one that I had originally has been lost.

The client has started fresh and made new wallet.dat, erasing the one that I had restored in the first place. 

Is there anything that could be done?

Thats sad amigo. Did you make a backup from your wallet?