10億枚上限っぽい

http://shnd.blog.jp/archives/5760404.html

※12/19追記※
どうやら、1 billion = 10億SHND以上はお財布に入らないようです。
The SHND wallet can send maximum 1 billion SHND. If you are rich and try to send over 1 billion, the wallet will crash.
The only way to recover is to open database and delete all files EXCEPT wallet.dat and syncronize the wallet again.