I'm looking for an Android mobile app developer to build an application as eloquent and intuitive as BitPay, yet entirely uncontemplated to date (to the best of my knowledge).

We will be using a lot of open source code initially to build the core, experience in the Bitcoin protocol, cryptography and security are mandatory for obvious reasons.

Please PM me

It worked out nicely bro. Thanks.

I did some more searching for a solution that doesn't involve downloading the entire Blockchain and you can use the following command in terminal to rescan the blockchain and update balances without having to download anything or use bitcoind etc. (change the app name and directory to reflect your Qt client) 

ok great. Ill try this and post the results here.

Sure, I've been trialing my cold storage with peercoin right now so please bear that in mind. I've done this with Litecoin and Bitcoin already and the results have been the same, i.e. loss of 0.01 units of coin because I can't make the wallet hot.

No I don't. The Linux environment is live and so every time I boot from the USB it's a new OS

This is my exact process:

1. Boot into Linux Ubuntu 13.10 from a USB Drive (Trial mode)
2. Insert a second USB drive with bitcoin-0.8.6-linux.tar
3. Extract the files to the desktop
4. Run the Bitcoin Qt
5. Export the public addresses to a .csv file and onto the USB drive
6. Navigate to ~/.bitcoin/ subdirectory and copy the wallet.dat file to the 2nd USB drive
(7. I would install Truecrypt and create a secure vault at this point but the process isn't working so I've cut this step for now)
7. Reboot into Mac OSX 10.9.1
8. Insert the USB drive and copy the public address from the .csv file
9. Open Bitcoin Qt and send a small amount of Bitcoin to the public offline wallet address
10. Wait for one confirmation by searching the public address on Blockchain.info
11. Close the Qt client, navigate to the Bitcoin directory in Application Support/Bitcoin
12. Copy the offline wallet.dat file created in Linux into the Bitcoin directory, in the process replacing the existing file.
13. Reboot the Bitcoin Qt, allow the network to sync (seems to happen pretty quickly)
14. Voila! Nothing.

I hold alt coins also and so I've been trying to establish a universal technique for offline storage that doesn't depend on offline paper wallets, Armoury, Electrum etc.

Hi all,

I'm having problems getting Mac Qt clients to acknowledge wallet.dat files created in live Linux usb environments. I've tried moving the wallet.dat file over directly from the ~/.bitcoin/ subdirectory onto a usb drive and from there I've rebooted into OSX and replaced the existing wallet.dat file... no luck.

Is this only me? What am I missing?

Fractalbc said it quite well above, essentially however, if the foating point number system goes above this number it's analogous to an odometer at 9,999,999 ticking over to 0,000,001, except the numbers dont follow a noticable pattern and can become negative. The concept reminds me of Y2K. Furthermore, how can one expect anyone to ultimately embrace a fundamentally flawed protocol when there are a plethora of viable currencies to choose from.

As for Quark, I have no crystal ball but I believe that most people dont understand the bigger picture and are essentially being manipulated by some clever players, hence why it has value. Short term go for it, but I see no intrinsic value to a premined, poorly distributed quark.   

As for some of the other comments, I dont disagree with anyone speculating for a quick and profitable turn using alt-coins, what is destructive and ultimately unethical is 'communities' of scammers.

R0ach, anyone who thinks that issuing a currency with an outrageous block reward resulting in a highly skewed money supply for early adopters isnt a scam is fooling themselves, but more than anything else, fooling those around him or her. Its a way of pseudo pre-mining... noone knew the race was about to start, noone knew the race would exponentially benefit those at the start more than anyone else by many factors and a few miners/insiders have large amounts of processing power ready to switch on at the word GO.

There is no economic justification, and ultimately economics will prevail here, for anyone to adopt a coin which has already centralized most of its value in the hands of a few, like quarkcoin.

Dogecoin is a meme, its money supply is a joke, akin to a premine and I wont be investing in a single coin long term when the money supply doesnt even compute on most computers. If there's a lesson to be learned it's that social media and a robust community and implementation of a cryptocurrency protocol can open the door for a legitimate coin to scoop some market share. That coin is not Doge. WOW.

My 2 cents regarding catcoin is that its another opportunistic coin, which will generate a following as being the "Cat" to Dogecoin's "Dog". essentially, the community is more serious than that of Dogecoin, the protocol appears at a glance to be that of Bitcoin so that's an improvement. Ultimately though, while I think its a good short term punt to pump n dump as I see no intrinsic advantage over Bitcoin, Litecoin and a handful of others.

If you're going to mine or invest in Catcoin, don't leave your seat because when the market tumbles I see no reason for it to recover. And the same goes for all the new alt coins, if it has no adoption, no distribution or means of becoming distributed and no fundamental advantage over what exists expect it to fizzle. If you want to make money from them, trade attentively and be early. 

Remember this too, Bitcoin is a protocol change away from adopting part of another coins standard that might make it superior. Think of Vine doing videos on a timeline and Instagram releasing the same features a few weeks later.

Check the link my friend: http://bitcoinmagazine.com/7781/satoshis-genius-unexpected-ways-in-which-bitcoin-dodged-some-cryptographic-bullet/

Floating point integers, not standard integers.

Hi BitcoinTalk,

I'm new to Bitcointalk but not new to cryptocurrency so I wanted to point out a couple of observations Ive made regarding alt coins.

Floating point numbers in modern computers can go up to 2^53 or aprox 9.0x10^15 units... after this point the numerical system goes haywire (google it).

Bitcoin is 2.1 x 10^15 units, at 21,000,000 bitcoins divisible to 0.00000001 and Litecoin has 8.4x10^15 units (which is uncoincidentally close to the above mentioned limit)

In simple terms therefore DO NOT put money into any coin with more than 90,000,000 coins divisible to 8 decimal places (Quark, Dogecoin etc) unless you are a speculator playing the pump n dump market well as by definition its dead in the water.

Also look out for 

1. Premined coins
2. Coins with very large block reward changing at rapid intervals. These coins don't need to be premined as the early adopters reward is so skewed there's no need to pre-mine in secret when a couple days headstart will do it. 
4. Coins which bring no utility to the marketplace.

The only positive thing I will say about Dogecoin is that it demonstrates the potential to use social media to distribute and educate the masses on a cryptocurrency, and ultimately, cleaning up the image is a matter branding if the coin is useful. With that said, it upsets me to see so many people getting scammed out of money by being greedy and believing the hype. Welcome to a world market, real businesses offer real service and real return. Leave the doges and cats to the young hackers/scammers.