OK, for those of you who are running v1.0.0.1 with their wallet unlocked and yet don't think they are getting their 10% PoS:
First of all, have you received any PoS mining rewards since 4th May? If you have one in the last 24hrs yet it is far too small to be a 10% reward then something isnt right at all - suggest you backup your wallet.dat then flush all your YC files and the data folder from %user%/appdata/roaming, then reinstalling the new wallet from scratch.
If you haven't received any PoS mining reward at all (the crossed hammers symbol, listed as "mined" under Transactions) then close your YC wallet, wait 5 min and then reopen it and unlock it. Clcik the Help menu and "Debug Window", then from that window "Open" the debug log file. Start from the bottom end of the log and scroll up, you'll see a load of "IRC got who" lines then above that is the log of the wallet client starting. Important thing to look for is the "CPUMiner started for proof-of-stake" line, if its not there then your wallet isnt processing your PoS and you probably need to do the reinstall. There is a way you can disable the PoS CPUminer, but if you know enough to do that you probably dont need my help.
Assuming it all looks ok then you just need to be patient, and bear in mind how PoS works - I believe the YC system is based on that introduced originally by Peercoin, where the PoS minting process is dependent on your coin age in a sort of lottery process. Whilst your wallet is running and you have coins which have been sitting in it for longer than the required staking period (24 hours here), it will generate a block every so often attempting to "claim" your PoS reward. As in PoW mining your block has to be accepted by the network to be recorded as a successful transaction and your coins to be credited, otherwise it could be rejected as superceded (someone else beat you to it), or get orphaned as part of a rejected blockchain fork.
The PoS mining difficulty remains very low in order to make it possible for any CPU to create blocks, so that isnt used to enforce the 20sec block creation time. I'm guessing a bit here, and ppl are welcome to correct me, but looking at the blockchain explorer the critical factor seems to be average coin age, which is currently around 2.8 days. Bear in mind that when you receive a PoS reward the age of all your coins is reset to zero, so at the current rate you have to wait another 2 days and 20hrs to receive your next PoS reward. You dont lose out though, as you should get nearly 3 days worth of PoS interest then.
With so many actively staking wallets and a 20sec block time its not possible to average a daily payout, looks like around once every 3 days....
I do believe I will get nothing from PoS during the 10% PoS period.