Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Unreliable for certain key combinations

I ran into trouble when using the left shift and left windows keys simultaneously. For example, I remapped the keys for use on my Mac and then used shift-windows-arrowkey during text editing. Those two modifiers, when used in concert, register only about half the time; the rest of the time, only the arrow key is sent. I'm sure it's the adapter, since it happens on my Dell AT101W and the keyboard from an old HP Pavilion. The latter keyboard doesn't have this problem when using a simpler passthrough USB/PS2 adapter. (I don't have another adapter or a PS2 computer to test the former.)