2 Issues or Nuances Need Help with On Easy Tooltip

Nice ToolTip Plugin – 2 Quick Questions…
1. On Firefox 10+ the icon – ie. question mark, “X”, etc… (depending on the type) do not align on the far top left of the hover box like it does on IE and Chrome… its near the middle – and covers part of the text/title – why is that? What I did in the meanwhile is just make a blank info.png but would like a solution if possible.

2. If we have a hover link that is too close to the right – the hover box goes off the screen to the right… anyway to fix that or have the hover pop up in the middle of the screen or detect where its at and if too far to the right – it puts the hover box to the left?

thanks

http://wordpress.org/extend/plugins/easy-tooltip/