Shortly after activating the network and opening up the source to mining, the HTMLCOIN devs discovered two small, non-critical bugs that would have an impact on the block generation time or cause the block rewards to function differently than planned in the spec. Because these were caught shortly after launch, we decided to freeze the GitHub and correct the bugs with an immediate-release wallet upgrade. That release is being compiled and tested now. No users were negatively affected by this, and the extent of the issue was both small enough, and caught early enough, that there was no appreciable impact to the coin economy. 

Any users who have coins on the exchanges or in the “old” HTML5 wallet (have not swapped yet) are not affected and don’t need to do anything. But, due to the necessary wallet upgrade, all users who downloaded or compiled their own v2.0.0.0 wallet will need to upgrade to the forthcoming release version, v2.0.0.x. The best practice for upgrading is to simply install the new wallet over the previous version. This update will not touch the wallet file, and the blockchain remains the same. Shortly after release, the previous version of the wallet will not be compatible and users of the previous version will no longer see an accurate representation of the blockchain. As the blockchain is a distributed ledger, no coins or addresses are at risk, but you will need to upgrade your wallet client in order to interact with the blockchain (send or view transactions) going forward.