Syntaks,
Many thanks for the response. The missing coin is not a huge amount, it's more frustrating losing coin after miners humming away earning them. Your offer to replace missing coin is very kind and much appreciated. As mentioned before the amount is not huge so please don't worry about recovering or replacing the missing coin from your own pocket.

I have had NO issues with iSpace payouts, all have been received with no issues barring the recent problem with NEOS. I've mined iSpace for a long time since they were only a Tigercoin pool and never had problems that weren't resolved quickly.

The QT wallet was v1.0.0.0. I did backup the wallet.dat file before running the upgrade. There were no coins in the wallet before the upgrade so no losses there. It was after I had noted the new primary address and updated my iSpace payout address that the coins went missing between pool and wallet. Coins were leaving iSpace and were arriving in the new wallet, after a few days they stopped arriving in the new wallet?

I only tested the opening of the NEOS wallet then other wallets once so perhaps I should test a little more to try and give you an idea of what might be causing the issues. Before the upgrade all the other alt coin wallets seemed fine.

As a precaution I have disabled the services for NEOS. I don't really want a wallet having services or background software running on my PC.

As I said in previous post. I do like the idea of a web based wallet. I wanted to let you know some of the issues I'd had in case anyone else had experienced similar issues.

@infernoman, Asking for help with this problem, not really, the amount of coin missing didn't warrant me spending that much of anyone's time to resolve it. I rarely end up with NEOS coin so didn't see this would be an ongoing problem for me.