I'm having the same issue! I bought mine in early October and it worked just fine for about 2 weeks before the cursor started giving me trouble. I spoke to support on facebook and did everything they suggested and it didn't work. I opened a repair request and sent my chromebook in for a week and it came back saying they found no issue but it's still there! I can use the trackpad just fine for a while, but it inevitably becomes jumpy and unresponsive after a bit of use. I have to leave it shut down for a few hours before it becomes responsive again. It's driving me crazy, i've only had it for a bit over a month.
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