I'm using FTGL 2.1.2 (fedora 11 package ftgl-2.1.2-10.fc11)
I noticed that using some face at some size I don't get the full string rendered on some video cards. For example: using Bitstream Vera Sans Roman 14 on some nvidia 7300 works but fails on 9400 models. If I write "jfoojbar" I see " foo bar". I'm using OpenGL rendering with FTGLTextureFont..
In my test case I found that in FTTextureGlyph::FTTextureGlyph glTexSubImage2D fails form the 'j' letter (I got an OpenGL error because yOffest + destHeight is more than the texture heigth! (I think that there are something internal difference between 7300 and 9400 so the first show the character anyway).
FTGLTextureFont::MakeGlyph initialize yOffest to padding, but FTGLTextureFont::CalculateTextureSize doesn't take enough room for the texture height. I attached a patch to quickly fix this problem using the same way to add the padding space that you are using for texture width.
I think that my patch isn't the right way: with this fix we'll waste a lot of video memory. I'll try to remove vertical padding from texture and work on translation between lines. I also noticed that next versions will have a simple layout management so I'll work for a better fix on the trunk version.