Recovery works just fine.
There are few possible scenarios why this happened:
a) coins were moved from your wallet- check transactions history
b) you mined those coins on some side-chain that was not the main chain and therefor disapeared when you synced to main chain
c) you have 2 wallets and forgot about it
I dug in several wallets. I controlled the complexity of the found blocks so that the chain was the main one. A friend from another city has exactly the same story: 90-95% of coins are lost. In version 0.1.7.5 they are, in the later there is not. For this reason, I stopped getting a coin: I lost about 5000 BLUR.
The representative of the wallet developer refuses to recognize the problem. Presumably, the problem exists only in the windows version of the wallet.
Another chain is impossible: on each machine had its purse and couldn't they all prove the alternative chain.