Telling 5th and 6th printings apart

The 6th printing failed to increment the printing number on the outside of the box by the UPC code. (And both printings incorrectly refer to "edition".)

You can still tell the difference from the outside of the box: 5th printing uses the old Greater Than Games logo (shown below on a 4th printing box); 6th printing uses the new Greater Than Games logo. If the box is open, you can also tell the difference by checking for any of the typos fixed in 6th printing / the 4th + 5th printing errata pack - see Errata Pack (Core 4th/5th, B&C 3rd) for details on those typos and how to acquire the errata pack.