Hello,
I think there is a bug in border tracing, as if I set BorderThickness to 1 the right and bottom border of elements like Border and ItemControl is not traced, if I set BorderThickness to 2 the borders are all four traced but 1 pixel thick.
This happens in some situation, not always, but I don't wonder what's the conditions. Sometimes, changing the contained elements dimension causes the borders reappear, but it seems there is other factors than dimensions.
Regards
Flavio