PowerBook G4 Dodgy Graphics?

hey everyone, today cloned emac hard drive powerbook install leopard on (as don't have discs). used carboncopycloner. it's been running amazingly suprise there 2 things annoying me... know there's not problem graphics card top sites & games etc. worked fine on tiger. in leopard, can see pics below, it's coming out lines , bars , splodges of nasty stuff

wondering if maybe problem id fact cloned drive?

btw emac has radeon 7500 (32mb) & powerbook has geforce 420 go (also 32mb)

cheers

 

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