Had the same graphics problem, but also w/ Seamonkey, IE8 worked normally. this is what I did to fix it.Some of this will be different w/KM, but it's a start, and in 2 PARTS
PART 1
Enter about:config in the location bar (where you enter URLs), and add a new preference named general.useragent.extra.seamonkey2. Do this by right clicking on any of the existing preference names already list
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