Android and Me has posted an article stating that the Nexus One screen has issues following multiple touches across the same axis. Robert Green, a application developer for Android OS devices, first discovered the issue when he was testing one of his apps that tested the multi-touch sensitivity of a phone. He said:
“This app shows how your phone’s hardware handles multitouch. The event data is not processed in any way. The two dots are drawn exactly where the phone reports you are touching. For many current Android phones, there will be lots of bad data including axis flipping and near-axis influence.”
Pinch to Zoom, which was introduced to the Nexus One is a software update, does not seem to be affected by this issue. It seems like only applications from the Android Store are affected.
Google engineer, Dianna Hackborn, has responded to the issue in the Android Developer group:
“Sorry I meant exactly what I said: this is how the touch screen hardware on the Nexus One works (which is essentially the same screen as on the G1 and myTouch). The Droid has a sensor from a different manufacturer, with different behavior. Other phones will likewise have different sensors.”
This video shows and explains the issue:
