Startx error with XFree86 4.3 & i810

[Victor <vdemart@supereva.it>]

I was compelled to download the unstable XFree86 4.3 in order to use the new 
Gimp 1.2.
Now when I issue the command startx the following error pops up and the 
hraphic display doesn't start:
.....................................................................................................................
(II) Module ramdac: vendor="The XFree86 Project"
	compiled for 4.0.3, module version = 0.1.0
	ABI class: XFree86 Video Driver, version 0.3
Symbol VBEInit from module /usr/X11R6/lib/modules/drivers/i810_drv.o is 
unresolved!
Symbol vbeDoEDID from module /usr/X11R6/lib/modules/drivers/i810_drv.o is 
unresolved!
(II) do I need RAC?  No, I don't.
(II) resource ranges after preInit:
	[0] 0	0x40200000 - 0x4027ffff (0x80000) MS[B]
	...............................................
(==) I810(0): Write-combining range (0x44000000,0x2000000)
(II) I810(0): Setting dot clock to 49.5 MHz [ 0x1f 0x6 0x30 ] [ 33 8 3 ]
(II) I810(0): chose watermark 0x22009000: (tab.freq 49.5)

Fatal server error:
AddScreen/ScreenInit failed for driver 0
...........................................................................................................
Is there anyone out there able to explain what do those VBEinit and vbeD0EDID 
symbols mean and how I can fix the problem?
Ciao
Vittorio