I SOLVED my problem.
this is what I think my problem was:
I have manually installed some fonts in a new folder (NOT of the X fonts packages) some times ago and used this fonts with many applications(kde, opera..etc)
I think that X upgrade don't recognize and setup this new folder correctly.
I have to exit from X server and editing /etc/fonts/font.conf to put my new folder in. This file configures the fc-cache command.
Try put your new fonts directory(s) in this xml file and rerun fc-cache out from X server and restart X.
Hope this helps , let me know

If you want XFree86 4.4 to support truetype perfectly,should do as the followings:
1. get xfree86 4.4 src files,change include/freetype/config/ftoption.h,
#define TT_CONFIG_OPTION_BYTECODE_INTERPRETER
change xc/config/cf/xf86site.def,uncomment about BYTECODE_INTERPRETER

2.recompile xfre86 4.4


if you see the wide spaced fonts,you should add the followings to /etc/fonts.conf

<match target="font">
<test name="family"><string>SimSun</string></test>
<edit name="spacing"><int>0</int></edit>
</match>

SimSun is your truetype font name,you can change it to yours.
the important item is
<edit name="spacing"><int>0</int></edit>

spacing should be 0.

skedit
that last tip about spacing is spot on, thanks a lot.
I dont think you really meant truetype, however, as the spacing problem seems to occur on non-truetype fonts such as helvetica,charter,lucida,utopia etc.
I actually put your addition in ~/fonts.conf for helvetica and it works perfectly.
What I want to know is how did xfree86 4.4 break what worked ok before?
Did you trawl through fontconfig docs to work that out?
cheers
tobyl

tobyl:

I have seen the followings in /etc/fonts.conf:

Some Asian fonts misadvertise themselves as monospaced when
in fact they are dual-spaced (half and full). This makes
FreeType very confused as it forces all widths to match.
Undo this magic by disabling the width forcing code -->

then I read /usr/X11R6/share/doc/fontconfig/fontconfig-user.html
roman slant 0
italic slant 100
oblique slant 110
proportional spacing 0
dual spacing 90
mono spacing 100
charcell spacing 110
unknown rgba 0
rgb rgba 1
bgr rgba 2
vrgb rgba 3
vbgr rgba 4
none rgba 5

but in fc-cache.1 file,spacing is 90. so I change fonts.conf and force spacing to 0.

thanks skedit.
I have managed to get a satisfactory setup now, even without recompiling Xfree, using your tip. I was annoyed with myself for not finding the answer on my own.
thanks again.

The new build of xfree86 4.4.0 fixed this issue for me.

-Joey