Seems I'm starting to experience this issue, too
(wifi off, data off, 3g off, bt off, gps off, stock kernel)
I've the phone since over 1 month and a half, and I did the 2.2.4 OTA immediately.. until yesterday late afternoon, had no issues of sort.
But there's one thing I did yesterday, that I think MAY be related to this issue some of us are experiencing. Yesterday I was in a mall, and decided to turn on wifi to check the free hotspot there... just for 1 minute (all the rest of the time, up to when I'm writing now, wifi was off, data off , gps off).
Battery was 71%.
Back home, after around 1h, while putting the phone down I realized something was wrong... battery was at 31%.
I find a strange coincidence that this started when I tried briefly that free wifi hotspot...
Anyway, put the phone on the touchstone from 7pm until 4am, removed it from the touchstone and went to sleep... at 11:20 the phone was down around 28%, so a 10% drain each hour.
I've done a full reboot (noticed, after the reboot, that the wifi entry in the pulldown where you can activate wifi-bt-vpn, had no more OFF or ON next to it, but just an empty space. Turned it on to connect 1 second to my local wifi, turned it off, and the ON - OFF reappeared) and put the phone again on the touchstone.
Now is charging, and I'll keep a close eye on it, today.
I'm pretty sure that the battery icon shows that's charging quite fast now... and I'm pretty sure that it took a lot yesterday, to get to the same level.
I'm also quite sure to remember that yesterday, on the touchstone, the temperature in govnah was 39, while now is 37
Ah yes... before rebooting, Top shown LunasysMgr having a quite high runtime...