Compiz: иногда не перерисовываются окна :( [SOLVED]

собственно subj. особенно в браузераз opera и firefox... т.е. какой-нить маленький кусочек окна обновляется, а все остальное без изменений... но стоит принудительно обновить окно (ну скажем крутануть колосиком на мыше в браузере) и все отрисовывается нормально. пробовал играться с плагинами в компизе... пересобирал ядро... собирал заново компиз - ничего не помогает. =)

видяшка GTX-260. дрова:

*  x11-drivers/nvidia-drivers
      Latest version available: 180.29
      Latest version installed: 180.29
      Size of files: 51,046 kB
      Homepage:      http://www.nvidia.com/
      Description:   NVIDIA X11 driver and GLX libraries
      License:       NVIDIA
*  media-video/nvidia-settings
      Latest version available: 180.29
      Latest version installed: 180.29
      Size of files: 1,310 kB
      Homepage:      http://www.nvidia.com/
      Description:   NVIDIA Linux X11 Settings Utility
      License:       GPL-2

/etc/X11/xorg.conf:

Section "ServerLayout"
	Identifier     "X.org Configured"
	Screen      0  "Screen0" 0 0
	InputDevice    "Mouse0" "CorePointer"
	InputDevice    "Keyboard0" "CoreKeyboard"
EndSection

Section "Files"
	ModulePath   "/usr/lib64/xorg/modules"
	FontPath     "/usr/share/fonts/misc/"
	FontPath     "/usr/share/fonts/TTF/"
	FontPath     "/usr/share/fonts/OTF"
	FontPath     "/usr/share/fonts/Type1/"
	FontPath     "/usr/share/fonts/100dpi/"
	FontPath     "/usr/share/fonts/75dpi/"
EndSection

Section "Module"
	Load  "glx"
	Load  "extmod"
	Load  "xtrap"
	Load  "record"
	Load  "dbe"
#	Load  "dri"
EndSection

Section "InputDevice"
	Identifier  "Keyboard0"
	Driver      "kbd"
        Option         "XkbLayout" "us,ru"
        Option         "XkbOptions" "grp:ctrl_shift_toggle,grp_led::scroll"
        Option         "XkbVariant" ",winkeys"
EndSection

Section "InputDevice"
	Identifier  "Mouse0"
	Driver      "mouse"
	Option	    "Protocol" "auto"
	Option	    "Device" "/dev/input/mice"
	Option	    "ZAxisMapping" "4 5 6 7"
EndSection

Section "Monitor"
	Identifier   "Monitor0"
	VendorName   "Monitor Vendor"
	ModelName    "Monitor Model"
EndSection

Section "Device"
	Identifier  "Card0"
	Driver      "nvidia"
	VendorName  "nVidia Corporation"
	BoardName   "Unknown Board"
	Option      "AddARGBGLXVisuals" "True"
	BusID       "PCI:1:0:0"
EndSection

Section "Screen"
	Identifier "Screen0"
	Device     "Card0"
	Monitor    "Monitor0"
	SubSection "Display"
		Viewport   0 0
		Depth     1
	EndSubSection
	SubSection "Display"
		Viewport   0 0
		Depth     4
	EndSubSection
	SubSection "Display"
		Viewport   0 0
		Depth     8
	EndSubSection
	SubSection "Display"
		Viewport   0 0
		Depth     15
	EndSubSection
	SubSection "Display"
		Viewport   0 0
		Depth     16
	EndSubSection
	SubSection "Display"
		Viewport   0 0
		Depth     24
	EndSubSection
EndSection