Out of interest, I looked at the files I got with my V1 and V2 low res by installing them in separate temporary folders. The OBJ files were identical down to the last byte. Your mileage may vary of course; a newly purchased figure isn't guaranteed to be the same. Mine were dated 16 May 2002.

As for publishing one line of an OBJ file, this quote is from the Copyright Forum FAQ:

"Under the fair use doctrine of the U.S. copyright statute, it is permissible to use limited portions of a work including quotes, for purposes such as commentary, criticism, news reporting, and scholarly reports. There are no legal rules permitting the use of a specific amount of use and whether a particular use qualifies as fair use depends on all the circumstances."

In my opinion publishing the comment line from a mesh (not even a single vertex coordinate) should not be a problem. However, do bear in mind that I am not a lawyer, nor do I play one on TV. Copyright law makes fools of us all. :)

There's been a similar problem with the various versions of V3; the newer SAE OBJ has a different header to the SR1 version. Although the actual mesh - vertices, facets, UVs - is identical, in order to decode an Objaction or RTE encoded item you still need the same version as it was encoded against. It's possible to convert one to another with a text editor and a little care.