When I access the Storage report via About this Mac > More info... I am noticing some strangeness: I see quite significant amounts being reported for file types that I don't have a lot of on my hard disk i.e. 1.26 GB Audio; 9.94 GB Movies; 4.72 GB Photos...
Using Disk Inventory X I noted that the most significant consumers of my disk space at the moment are the backup of my iPad (which is categorized as iTunes Document by that app and mostly consist of iOS apps and a couple of books) and my DropBox folder (which has some pictures and movies but not that much given I only have under 12 GB of DropBox space).
How does the Finder categorize file types and indeed what is 'Other' which is currently consuming 29.44 GB of disk place?