as for those who want me to lose coins, THANKS... same to you
If you want minimum risk, use the stable client for now?
from now on i will, because nobody mentioned that we can actually lose our coins due darksend wallet...
It is very very hard to lose coins and nobody has reported this happening. The only reported case of wallet corruption was due a different reason (mismatching libdb) and those coins where saved by Propulsion. The only tangible effect of using an old wallet with v30 and above is that you use a ton of CPU cycles when syncing the blockchain.
If you are paranoid then use the stable client.
Or use RC4 and dump your private keys and load them to a new wallet (should save your transaction history) or send your coins to a new wallet (lose your history on the new wallet, but you can always keep the 0 balance wallet for the history).
Oh... and if you read the "about" section of the wallet it clearly states that DarkCoin is experimental and that you use it at your own risk.
Edit: And backup often! On the 1/100000 chance something gets corrupted if you have a backup then you are in the clear.