An interesting point -- opening the lid turning the screen on, but you're still in lower power mode. The question then becomes --
Since you enabled low power mode (using the power switch), thats the logical way to un-low power mode.
Two outcomes come to mind ..
When opening the lid, one of:
i) wake up from low power mode, or
ii) Don't turn the screen on when in low power mode
(or a variation of (ii) -- flash a warning "hey, I'm in lower power, bugger off, and hit the power switch")
I can code something in; probably occured due to in my prototype, I broke the power switch, so I didn't use low power mode near the end
I've logged it to the bug tracker (attention to me), so we can review it when things settle down a bit.
http://bugs.openpandora.org/index.php?do=details&task_id=85
jeff