Okay, it should be set up for the following:

a) no duplicate named accounts should have decks that belong to the other accounts
b) if you have a duplicate account, and it's not the current 'account', you can try to login.
b1) if the old account was last logged in in 2004 or earlier, yours will take precidence
b2) If you still can't log in, send me a PM on the forum with your username, and I'll look into it manually.

If it turns out that there are two currently used accounts with a name collision, one of them will have to unfortunately be renamed. This will be handled on a case-by-case basis.

Edit: It should be noted that the VAST majority of accounts are not affected by this. Out of approximately 7000 accounts, only 200 suffer from the name collision issue, and most of those are barely-used accounts from 2004 or earlier, and most of them are simply temporary/old accounts of the other person. If you're unsure if you have this problem, here is a list of all accounts suffering from this issue.


Edit: There's also a problem with trading. I've disabled it, it'll be fixed next server restart.