X386 1.1: Anyone seen this behavior?

[Clinton Jeffery]

When I run xinit, before things get very far I get:

Fatal server bug!
no such dot-clock available (158)

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Has anyone seen this before?  X386 1.0 works fine.  The VGA is an
Orchid Prodesigner (et3000) w/ 512K.  I would assume that I
have the 1.1 configuration file wrong, but I just took the 1.1
configuration file and added lines that worked great in X386 1.0...
and trying other configurations hasn't worked so far.  I certainly
don't have any number 158 in the Xconfig file.  I am aware of
the fact Xconfig changed locations and added parameters from 1.0 to 1.1.
Has anyone else encountered this sort of thing?  Bad protections?
Corrupt binary?

Thanks, (and once again, Thanks to Thomas!)
Clint
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Here are the uncommented lines from the Xconfig...
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 Primary
 Keyboard     # get the default-mapping that was estebished by ttymap(1) 
MouseSystems "/dev/tty01"
 Display 270 180      
 WhitePixel	"White"
 BlackPixel	"Black"
 RootVisual	PseudoColor
 RGBPath	"/usr/lib/X11/rgb"
 FontPath	"/usr/lib/X11/fonts/misc/,/usr/lib/X11/fonts/75dpi/,/usr/lib/X11/fonts/100dpi/"
Graphics
ET3000   512   864 606   25 28 33 35              "800x600"
 "640x480"   25     640  672  768  800    480  490  492  525
 "1024x768"  62    1024 1072 1176 1272    768  778  779  804
"800x600"   35     864  924  956  1040    530 530 532 565
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| Clint Jeffery, U. of Arizona Dept. of Computer Science
| cjeffery at cs.arizona.edu -or- {noao allegra}!arizona!cjeffery
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