Our good friends over at Myriadcoin have released a mandatory wallet upgrade earlier today, which brings some interesting changes to the way blocks are found by each mining algorithm. Furthermore, there will be a hard fork, a weighting algorithm to determine the mining difficulty for all supported algorithms, and stealth addresses!
Myriad Hard Fork
One of the reasons why this Myriadcoin client upgrade is mandatory for all users and exchanges, is because there will be a hard fork at block 740,000. All involved parties are advised to upgrade as soon as possible,and download links can be found here.