Well I don't know who or why or how but when I just reran TexGen to get you the full log it was able to run through with the same plugin - no changes made. So....? Guess we'll move on - fyi, the plugin loads perfectly in Xedit, CK and Game. No weird conflicts with numbers in any of the worldspace/children records. Hopefully it was just a fluke. I'll come back if not, as I'd hate to tell my users to ignore an error like this or have them file false bug reports.
Thanks.