PLEASE STOP YOUR COIN2 DEPOSIT TO EXCHANGES !
WE HAVE A NETWORK SECURITY PROBLEM. The transactions are not confirmed anymore.
Wait for further instructions. HERE IS A WAY TO CANCEL YOUR UNCONFIRMED TRANSACTIONS AND TO RESTORE YOUR WALLET BALANCE:
For anyone wanting to reclaim "coins sent, but still with 0 confirmations", without re-downloading the blockchain...
This should recover unconfirmed sent coins back into the available balance (on windows)...
1. Open the C2.0 wallet.... Help > Debug Window > Console > 'repairwallet' >> Recovered amount will be displayed in output.
2. Close the C2.0 wallet...
3. Open the c2.0 wallet with "-rescan" parameter *
4. The recovered coins should now be included in the available balance.
* Shortcut Example
"C:\Coin2.0\coin2.0-qt.exe" -rescan
* CMD Example
cd c:\Coin2.0
coin2.0-qt.exe -rescan
Edit To Add:
As far as I know, this should work on any QT wallet.
Thank you FredDag, it worked fine for me and for others people.
i haven't read full announcement and send my coins on mintpal from my wallet , but in wallet it's showing 503 confirmation

but still 0 coins on mintpal ! i think i lost all my coins ! and when i run this command (
'repairwallet' ) then it's not display any recover amount

i get only this message ->
wallet check passed" : trueDeposits are frozen on MintPal and they should take your transaction in account when they will swap the coins.
The repairwallet function doesn't work for you because your transaction is already confirmed.