The sprite of a character will describe the entire character and not the defined space detween two characters. For exemple, the little Ti-OS font have one pixel free between two characters. In the Ti-OS, theses sprites are stored with the space : the character 'e' has a width of 4 pixels for the Ti-OS. In fact, there is 3 pixels for the 'e' and 1 pixel for the space between the 'e' and the next charater. In the HibDLL, the width of the 'e' charater will be 3 pixels. The routine which draw strings will automatically add 1 pixel between each character.
For the space between two lines of strings, this is the same idea. For the Ti-OS, the little font have a height of 6 pixels. HibDLL will consider the little font having a height of 5 pixels.
This difference has been implemented to have more precision in drawing. For exemple, drawing justified paragraph will be more clean : the last caharter of a line won't finish with a free pixel.