Remember 0.6 had BDB 6.1 updated, so you need all version of wallet or import privkey from old wallet.dat - it's not backward compatible, only from 4.8 (old versions) to 6.1 (0.6 version).
Edit: after restart of client it started to send properly coins.
I tried, it did not work. In coin control, amount of mined coins is totally different than my total balance
Edit: Even block explorer doesnt see my mined nor coins i mined trough burning. Weird. However, i am 130 000 blocks away to sync for older client, and will try to import wallets i am using with 0.6