As Curtis explained: the default save location is the home directory of the user 'root' (because GParted is run as root), and the problem of the original reporter seems to be that he doesn't know how to navigate to that directory (which is not his fault, as it's not obvious for somebody new too Ubuntu/linux).
The real solution for such problems is not running GParted as root, but that would require a complete redesign of GParted...
Curtis: maybe offering to open the HTML page in the default browser could be useful too?
(Or maybe we can save the log to /var/log/* by default?)
As Curtis explained: the default save location is the home directory of the user 'root' (because GParted is run as root), and the problem of the original reporter seems to be that he doesn't know how to navigate to that directory (which is not his fault, as it's not obvious for somebody new too Ubuntu/linux).
The real solution for such problems is not running GParted as root, but that would require a complete redesign of GParted...
Curtis: maybe offering to open the HTML page in the default browser could be useful too?
(Or maybe we can save the log to /var/log/* by default?)