[ubuntu] 2 problems. No java and low resolution on one screen of two.

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http://ubuntuforums.org – I've just re-installed 10.04 64 bit. I installed the 'recommended' NVidia drivers and now have two screens working, but after the second screen lit up the first screen has gone to a different and lower resolution. The original 1280x1024 has dropped to 1024x768 and that is the maximum resolution available on that screen. The other is at 1280x1024. Previously I used to have to screens at the higher resolution. No new hardware has been installed. I've got all the updates available to me. Anyone got any suggestions? Secondly, and I have no doubt this has been covered before but I can't find it (Hardware)