Flash Input text missing the letter “I”

The other day we found a bug on Canned Banners that the letter “I” would not show up in one of our input text fields. Very puzzling indeed because all Latin characters were embedded and we were using Arial. Looking into it further, it turned out to be an anti-aliasing issue. The text field we were using was 11pt Arial with no Ant-Aliasing. So the letter I was basically a 1 pixel line. For some reason, that made the character disappear with those specific settings. I suspect a lowercase l would also have had the same problem. Changing either the font size or the anti-aliasing or the font fixed the issue.