I'm using Arduino 22, just grabbed Optiboot V3
So a copy of the Arduino 18 core is included here.
It seems my "basement machine" won't load the sketch at that speed ... You posted a nice picture of a gremlin regarding that problem.
I'm not asking for a solution to this unless someone has an idea.
I've tried the OptiLoader program and it's lightning fast
just couldn't load a sketch with my funky machine.