No, this apps does not cause high power consumption ... yes, it can be "Meegotouchhome", but you have to check it to be sure about it, as it might be something else too - the easiest way is to use "ResourceMonitor" apps (click 3rd one there, to see "top processes", then you know who using your CPU as they should be 0,00% on idle state) ...

By the way, I fixed my "Meegotouchhome" problem just by enabling Developer mode (needs restart) ... yes, that's correct, even there is a lot of suggestion to disable Developer mode in internet, but you can check yourself by using "Battery Usage" apps, which is a proper way ... and just believe what you can see by yourself ...

My power consumption (idle below 10 mA with active 3G internet, all enabled) and I am using this apps too - you can see a pic here with 8 mA idle power consumption (sent for this topic 2 days ago) ...