Nutch 1.0 and Hadoop 0.20

Hi,

Nutch 1.0 comes with Hadoop 0.19. AFAIK, 0.19 is not considered as stable. Can 
I upgrade it to 0.20? Do I just need to change hadoop-core or are there any 
other settings / changes as well? Has any one done this?

TIA,
--Hrishi
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