Ok, please try to delete the following rows from the file
Ah no damn wait i've just seen what I've written eheh.. I tought that the margin wasn't 100%, don't mind...
If someone that has touch wanna play with this, you must only try to lower the bold value in the code below (again in /mnt/us/extensions/kindlemenu/bin/stylesheets/portrait.css
border: 1pt solid #2c2c2c;
margin: 5pt 0pt 0pt 3.42pt;
Try to set it to 2pt etc.
Regarding the taskmanager, we'll wait for Twobob