Thank you very much for this generous gift, Font and Typography Group!

As I didn't really understand the difference between .otf and .ttf fonts I was researching the web and playing with the two versions in my font manager. I assume that both versions should should render identically but I noticed that in some text examples some of the characters seemed to shift.

To see what was going on I put two identical texts on top of each other in XDP7 and indeed noticed here and there a horizontal shift. I could easily neutralize these shifts by adjusting the kerning but I wonder if this behavior is to be expected or if this is a bug (if that is the right word for a font).

Examples of shifts I noticed are between the 'e' and 'p', the 'a' and 'b' and, especially, the 'r' and ','.

I apologize if I am raising a non-issue...