It's obviously the week that Froyo is on the menu, with Sprint pushing out a new incremental update for the HTC EVO 4G that takes it from the "unofficial" 3.26.651.3 version of Android 2.2 released last week to a supposedly more stable 3.26.651.6 release. According to a Sprint admin, the upgrade itself is "very small", suggesting that the Android 2.2 package that went out recently was all but polished for the EVO 4G.
Still, some users have been reporting poor battery life, loss of calendar or contacts entries, and generally sluggish performance with the previous update, and so hopefully this will address those problems. If you're too impatient to wait for the OTA update to be offered, you can trigger it by choosing "HTC software update" from the Updates section of the settings menu.
[via AC Forums]