Hi all,
I generated a .ttf file of a font that was created in FontLab 5.0. When I tried it out in Illustrator CS3, I found out that while my ligatures are working, for some reasons some parts of it drops out (image attached).

I really have no clue what's causing this, so I was wondering if someone could point out what might be going on and how to fix it. Also, this only happens with the ligatures starting with lowercase a — so I wonder if there's a possibility that there's some problems with the glyph that I probably overlooked?
Thank you in advance.
Cheers,
Christa