With 1:6.6p1-2ubuntu2.3 (Trusty) the alt-tab completion works, but the character isn't echoed back.
sftp> get nave
Fetching /tmp/naïve to naïve
Attempts to enter a character (AltGr+a for æ or AltGr+[+i for ï, for example) simply results in an error beep, which is new but thoroughly useless and a step backwards.
With 1:6.6p1-2ubuntu2.3 (Trusty) the alt-tab completion works, but the character isn't echoed back.
sftp> get nave
Fetching /tmp/naïve to naïve
Attempts to enter a character (AltGr+a for æ or AltGr+[+i for ï, for example) simply results in an error beep, which is new but thoroughly useless and a step backwards.