That may be one cause, but unfortunately there wont be a single reason for battery draining problems.

I for one had my battery drain 50% overnight last night and I can only think it was because I left the web browser open on this very forum. The N900 was even in offline mode!

Any device that has the users doing the quality control will have this problem, its another reason Apple keep their store closed up tight, so they can fully test an application before putting it live. Its the price for freedom.

But all the more so its very much appreciated that you report your own experiences with battery drain, so that everyone knows which bits of software may be problematic. I have said before that I usually keep the web browser closed when not in use as it does seem to be a battery hog even in the background.