[Freetype] Problem with irregular letter spacing

[Markus Ewald]

Hi!

I'm using FreeType 2.1.4 to display text in a direct3d application. 
While I'm perfectly pleased with the quality of the individual glyphs, 
I've noticed some irregularities in font spacing with my implementation 
which don't appear to exist at the freetype demonstration at 
http://mbox.troja.mff.cuni.cz/~peak/ftdemo/index.cgi (although that one 
seems to be using freetype 1)

Maybe an image can better describe my problem: 
http://www.lunaticsystems.com/data/ttf_font_spacing.png
The last 's' in 'systems' is far away from the 'm'; in the next two 
words, the 'e' merges with the letter after

My procedure for rendering a string of text is as follows:
o Load the typeface using FT_Open_Face()
o FT_Set_Pixel_Sizes()
o x <<= 6; y <<= 6;
o for each letter {
o Blit glyph bitmap at (x>>6) - glyph->bitmap_left, (y>>6) + 
glyph->bitmap_top
o x += glyph->advance.x;
o y += glyph->advance.y;
o }

Thanks,
-Markus-