After saving the image with a caption,
and opening the screenshot in another viewer,
the text does not show in the caption.
It's really important to me if you can reproduce this problem and figure out the details of why its happening.
Now one important thing if you really have a file which shows the text in one viewer but not in another, then it may be that its a TRANSPARENT background and black text, so you cant see it in your viewer.
But I need to know if it's a real bug.
So.. if you can find such a file, please attach it to a post in a reply or email it to me (email@example.com) so i can examine.