Just saw this exclamation point in a blue triangle icon in the top right corner of the glyph box on the main page. I expected to get a description of the problem by mousing over it, but I didn’t get one. So I clicked and I also didn’t see anything on the page.
It took me half a minute but I figured it out in the end, the right side-bearing was connected to another letter and it needed updating.
But I thought to suggest, maybe it would be helpful for the noobs to explain the issue in a tooltip?
Sv.