First of all - though I'm sure you know it - great tool!
Just installed JoomlaPack 2.0 stable and backed up the normal way which worked flawlessly as usual and in normal speed.
Then I also installed JoomlaPack Remote and set up the Windows App, connected and tried to backup twice.
Twice the same error "Could not open archive file for append!".
Also it seems to backup in a hell of a slow speed when trying over remote.
Any more info needed?
Joomla 1.5.6