...off the top of my head (from previous testing), Poser does not support line-continuation in .obj files.  This would show up in the file as a single backslash at the end of a line, meaning that there is more information about this record on the next line of the file.  These are normally only found on facet records, so it doesn't sounds like that is the problem (unless there happens to be one up in the vertex records).

Another issue could be negative values for vertex indices... if there are negative values in the facet section, this indicates a 'relative' index (count backwards, from current position), instead of an absolute index (count forwards, from start of list).  Poser 6 handled these fine, but it's possible that that broke in P7.

There could be some other 'non-standard' or uncommon formatting in the file that's causing P7 to choke on it.  UVMapper is pretty good about reading most .obj files, and it doesn't do anything wierd on export, so that's fixing whatever the issue is.

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