Sprint sent out OTA maintenance updates yesterday to the HTC EVO 4G and the HTC Hero which bring some much-desired fixes for the EVO, and some bug fixes for the Hero. The biggest fix for many users that comes with the EVO's update is the removal of a 30FPS cap that HTC had previously said could not be fixed.
The HTC EVO 4G update (3.29.651.5) also contains, according to the picture leaked to Android Central, a fix for the calendar editing problems, "GPS reboot", and multiple Gmail Account Sync (which broke when Android 2.2 was released.)
The HTC Hero's update contains a "GPS reboot" fix and an attempt at fixing a problem regarding a "sluggish" dialer. If you were affeted by any of those problems and have received the update (2.31.651.7), then let us know how it works.
AndroidandMe mentions that "Sprint is being pretty quiet about the update, so we have no indication as to how fast it will be rolling out to all" devices.
Androinica adds (at least in terms of the HTC EVO 4G) that "Root users should not apply the update; simply wait for your ROM’s developer to integrate it into the next version."
Engadget comments that, in regards to the EVO update, "Sprint's official changelog only mentions the calendar and Gmail sync fixes, so it's possible they're trying to keep the other two low-key to prevent undue questions and curiosity from folks as they upgrade."
Image from AndroidandMe