A quick note on Sprint’s support site indicates that the HTC EVO 4G will be getting a small software update sometime in the near future. The update lists “calendar event edit issues” and “multiple Gmail account sync” as the two problems it is designed to address. The version number is also listed at 3.29.651.5. You can check for the update by navigating to Settings > System Updates > HTC software update on your EVO 4G.