This post follows up on previous post Eagle 7.3 schematic: cursor missing in text boxes?, with some actual screen cap evidence :-)
Throughout Eagle 7.3, upon initially clicking into a text edit box, the insertion point cursor is invisible until I start typing, or use the arrow keys to move the insertion point. Often that's very annoying because you get no feedback as to whether you've positioned the insertion point at the correct position in the existing text. At the very least, you can't tell that the text edit box has focus.
System: Windows 7-64, up-to-date.
Problem did not occur in 6.5.
Attached screen cap video shows 6.5 and 7.3, running side-by-side demonstrating the problem only in 7.3..
It's speculation for sure, but it's as though 7.3 (or at least 7.x) uses a more recent version of QT which has somehow changed the initial visibility of the insertion point and requires a slightly different calling procedure.