Yes... Battery performance plummeted from 2 days to barely lasting a day. After a thorough analysis it turned out to be standby drain - no apps whatsoever; I even performed a hard reset to be extra sure. On top of that, phone heats up from even the slightest use (e.g. 5 mins of browsing). Worst of all, you can't revert a firmware update unless you want to void your warranty. Definitely disappointed by HTC.
Question: If I send it back at the service, will they be willing to revert the firmware of my device - at least until a fix is released? I mean seriously, it's unbearable for a device with no background tasks to drain 30% battery overnight (with 2G on).