I was reading 1 John 1:40 in the NA-27T. As you can see here:
Accent box.PNG 6.36KB 0 downloads
There's an odd rectangular box at the beginning of verse 40. Checking the same text in my iPad, I see that there should be a smooth breathing mark with a circumflex over it in that spot. But in both NA-27T and GNT-T, on my Windows machine it shows up as a box. This happens both in 10.3.3.1 and in the Aleph.
Windows Vista Home Premium.