You can use the GUI tool called TimeTracker (direct download link here):
TimeTracker is a quick-and-dirty application that displays the contents of your Time Machine backups, and shows what's changed since the previous backup
That should suffice to examine your backups.
On OS X 10.7, the
tmutil command will probably let you do the same, albeit only through the command line. To compare your current OS X state and the latest backup, run:
You can also compare two snapshots with each other, e.g. the latest two:
tmutil compare <path-to-snapshot> <path-to-snapshot>
… where the path to the snapshot is on your Time Machine volume, within the