here I have F9 with X1900 card and using radeon driver.

Just released so I try to post here, marking [OT], thanks.

I'm using/testing kde4
I found the script compiz-check at http://forlong.blogage.de/article/pages/Compiz-Check

It tells mr that all is ok....

[gcecchi@tekkaman ~]$ ./compiz-check
./compiz-check: line 65: lspci: command not found

Gathering information about your system...

Distribution: Fedora release 9 (Sulphur)
Desktop environment: KDE
Graphics chip: ATI Technologies Inc R580 [Radeon X1900 XT] (Primary)
Driver in use: radeon
Rendering method: AIGLX

Checking if it's possible to run Compiz on your system...

Checking for texture_from_pixmap... [ OK ]
Checking for non power of two support... [ OK ]
Checking for composite extension... [ OK ]
Checking for FBConfig... [ OK ]
Checking for hardware/setup problems... [ OK ]

lspci as root gives:
01:00.0 VGA compatible controller: ATI Technologies Inc R580 [Radeon X1900 XT] (Primary) (prog-if 00 [V
GA controller])
Subsystem: ATI Technologies Inc Unknown device 0d02
Flags: bus master, fast devsel, latency 0, IRQ 16
Memory at 80000000 (64-bit, prefetchable) [size=256M]
Memory at 90200000 (64-bit, non-prefetchable) [size=64K]
I/O ports at 2000 [size=256]
Expansion ROM at 90220000 [disabled] [size=128K]
Capabilities: [50] Power Management version 2
Capabilities: [58] Express Endpoint, MSI 00
Capabilities: [80] Message Signalled Interrupts: Mask- 64bit+ Queue=0/0 Enable-

but when running fusion-icon I get no title bars.
I can switch between metacity and kwin as windows managers but when I use compiz, I get no title bars.
Also no effects at all.
Alrady tried to enable windows decorations.
If running fusion-icon inside an xterm I get this:

[gcecchi@tekkaman ~]$ fusion-icon
* Detected Session: kde
* Searching for installed applications...
* Using the GTK Interface
* Interface not installed
... Trying another interface
* Using the Qt4 Interface
* KWin is already running

then I set compiz as window manager:
* Setting window manager to Compiz
... executing: compiz --replace --sm-disable --ignore-desktop-hints ccp --indirect-rendering

and no titles, no ability to switch between desktops, no minimize windows, etc....

Here below my xorg.conf relevant parts. Thanks in advance for help

Section "ServerFlags"
Option "AIGLX" "on"

Section "Device"
Identifier "Videocard0"
Driver "radeon"
Option "AccelMethod" "EXA"
Option "XAANoOffscreenPixmaps" "True"
Option "ColorTiling" "on"

Section "Screen"
Identifier "Screen0"
Device "Videocard0"
DefaultDepth 24
SubSection "Display"
Viewport 0 0
Depth 24

Section "Extensions"
Option "Composite" "Enable"
Option "DAMAGE" "Enable"
Option "RENDER" "Enable"
Option "RandR" "on"

Section "Module"
Load "drm"
Load "v4l"
Load "GLcore"
Load "type1"
Load "vbe"

Section "DRI"
Mode 0666