The Android 2.3.3 Gingerbread update began rolling out for the Nexus One a short while back and it looks like things have not gone smoothly for all concerned. More specifically, it looks like the update has been bad for some Google Voice users. Some of the reports have stated that the current Google Voice app is not working after the update and perhaps more importantly, they are not able to be uninstall or update the app as is. That said, worry not because the Google Support forums appear to have a solution that will take care of your needs. In short, you will need to download and install an older version of Google Voice and then proceed to the Android Market to update to the latest version. With that, hit the link below for the download and the complete set of directions.