Symbian executive vice president for research David Wood made an important keynote speech in Symbian Smartphoneshow last October. In his speech, he listed six "horsemen of the apocalypse" challenges "standing in the way of smartphones fulfilling their promise".

The first one was fire.

Here's the slide he used:

Now, Techmundo is reporting:

I just notice something, first with Symtorrent, and now with Podcasting. With the wi-fi on and and the E61 downloading stuff, the battery is quickly drained. So I do the logical thing and keep the phone plugged in while downloading updates, but the back plate gets warm. And it gets warmed alot. I just want to know if this is normal. Any of you guys experience this? Normal charging doesn’t warm up the phone, but the wifi-download-charge combo seems to, and I just worry that it’s frying up my battery or worse.

Let's take these warnings seriously.

Bonus link: Coming soon: Your mobile is on fire