screen wavy after upgrade to Feisty - refresh rate? can't config display in kcontrol...

[anthony baldwin]

Oi colegas,

Since upgrading to Feistry from Dapper yesterday, I am noting that
the screen is wavy.  That's the best way I can think of to explain the 
phenomenon.
The image appears to oscillate at a rapid frequency and short wavelength.
I've made no changes to vidcard, etc. since dapper,
but I am operating at a slightly higher screen res.
I can't find where to alter the screen res in kcontrol (using Kubuntu, sim).
I can ignore it while doing lots of stuff, but, considering that I am a 
translator
and spend all day working with written text, and the text is doing this
(I can read fine, but), it is giving me a headache.
I suspect it has something to do with the refresh rate.
Should I be looking at than in my xconf stuff?

thanks,
tony

-- 
-----BEGIN GEEK CODE BLOCK-----
Version: 3.12
GL d- s-:-- a C+++ UL++ P L+++ E---- W++ N+ o- K- w-- 
O- M+ V- PS++ PE-- Y+ PGP+ t+ 5 X+ R tv b++++ DI D---- 
G e+++ h---- r+++ y++++ 
------END GEEK CODE BLOCK------