i use my computer with system windows 8.1, setup the 0.2.0a wallet

when i syncing the blockchain.
the height increase to 256670/259356  and  then the height became decrease.

is this a bug ?
because i just setup the wallet in a normal way in a normal computer with windows.
or just the wallet is no stable in windows?

Hi himmelsfaller! Sites like nodeexplorer.com expose your IP address. With this information anyone could try opening NCC over the web via http://xx.xx.xx.xx:8989/ncc/web/index.html.

Chances are someone accessed your NCC and created that new wallet. When running a public node, it's best not to have NCC running (running NIS with unlocked account is all you need to keep harvesting) or change its port to something unique only you know. I could imagine that NIS is not available because the same person specified a remote server (probably non-available one), which is why your NIS doesn't boot/refuses booting.

It is actually kind of a flaw that NIS can easily be made unavailable simply via NCC's front page at this point. I wanted to point this out earlier but you reminded me. Hope that helps.

Bter moved 10 million XCR into their hot wallet.   Two lucky nodes forged those blocks for 890 XCR each. 
Thats reason enough to keep your nodes up and forging.

Yes, it was repeatedly explained that you have to create a new wallet with 0.5.x (i don't remember). Next time you have a problem, just look for information or ask somebody if you are too lazy to find it by yourself (that is fine and not meant as an offence, not everbody has the time). We could have helped you within seconds and you wouldn't have to reinstall it several times.

Btw: The deletion of your wallet has nothing to do with your real account (NEM stake account). Just to make sure you don't get this wrong...

did you ever delete the folder where your wallet file is stored when reinstalling the client?

Reminder to Everyone

As we (hopefully) approach the launch of NEM sometime in the near-ish future, I think it is important to clarify a few things for everyone now and also encourage everyone who is a stakeholder to check that they have everything ready and prepared for launch to reduce the number of potential disasters and complaints when launch does finally happen.

As patmast3r has said a few posts back, the first thing everyone who is a stakeholder needs to do is to make sure that you still have the private key you received when you redeemed your stake. Without this private key, you will not be able to access the XEM that you are entitled to, so if you have lost it or something then you need to act on this immediately before the NEMesis block is generated at launch.

Secondly, please remember that the testnet we are all using now to beta test is not in any way related to the real NEM network at launch. This means that your wallets, accounts, or whatever else you have created for the testnet will not work on the actual NEM network after launch. So, remember, anything you do on the testnet is just for testing and getting to know how NEM works.

When launch eventually happens, you will be creating a new wallet from scratch just like the first time you ever used NEM and then loading the private key you received when you redeemed your stake to gain access to the XEM you are entitled to based on how many stakes you redeemed. But again, remember that without your private key, you will not be able to access your XEM so you need to make sure you have that stored safely and ready to load into the client after launch.

guys, can you suggest me which nvidia cards work with cudaminer and mine XCN?

As so many have realised, when we say surface mail takes 6-10 weeks (up to 13 weeks) from when it leaves the country we aren't kidding.

You haven't been scammed, you just chose a really slow shipping method. What you can do is contact our support department and enquire about it so that they can ascertain when it left the country and when you can either expect it or receive a refund if it hasn't arrived (as micax1 did when his didn't arrive in time).