The in-game debug window cuts off the first line of output - this can be quite annoying, since the first line is often the most pertinent.
Replicate; clear the log, then log something.
I've noticed that myself and agree it's super annoying. IIRC, there's a pseudo-hidden scroll bar that let's you see more text. Is that right, or am I going nuts?
It does scroll, but I'm fairly sure the top bar is just rendered over the first line of the text area, meaning the first line is always hidden.
Oh, right! I remember that now. Yes, that's exactly what happens. Text is rendered from the top of the debug window, rather than from the top of the client area.
It seems that it's alredy fixed. Thanks for reporting though.