Here's a log that I get; I too have a non-ascii username (Loïc) and U1 is unable to register, to start, and then keeps creating processes unless I kill everything an relaunch it as admin.
The problem is that it tries creating C:\Users\Loïc\AppData\Local\xdg\ubuntuone\syncdaemon\tritcask instead of C:\Loïc\...
Here's a log that I get; I too have a non-ascii username (Loïc) and U1 is unable to register, to start, and then keeps creating processes unless I kill everything an relaunch it as admin.
The problem is that it tries creating C:\Users\ Loïc\AppData\ Local\xdg\ ubuntuone\ syncdaemon\ tritcask instead of C:\Loïc\...