The problem is particularly acute with documents prepared using Microsoft Word because of the way it maintains hidden records about editing changes.

BBC: NEWS | Technology | Warning over Microsoft Word files

Sharing and editing video clips is also easier than ever, as the D3100 records movies in the versatile H.264 AVCHD codec (.mov file).

ENGADGET: Nikon D3100 gets real, adds 1080p movie mode with continuous autofocus