...
The tonido.log file is located in the following location:
Windows:
In Windows XP:"C:\Documents and Settings\yourname\Application Data\Tonido\data\logs"
In Windows Vista: "C:\Users\YourName\AppData\Roaming\Tonido\data\logs"
Linux & Mac OSX:
The log is located in your Tonido home directory
~/tonido/data/logs
TonidoPlug:
The log is located in
/root/app/tonido/approot/logs
...