It appears that the The Honest Lies of Two Riversides component causes some conflict with the initial Nashkel movie/transition to ch 2/3 for a BGT install. I noticed that the movie that normally plays (the one with sneaking kobolds near a farmhouse) didn't show when first arriving in Nashkel; plus Jajeira and Xzar did not seem to recognize that we were in Nashkel. So...
I examined the bcs file for Nashkell (AR 3700 in BGT) and noticed lines related to the above component appear at the top of the script, before the lines that trigger the movie and chapter advancement, etc.
I cut pasted the RE component lines to the end of the script (the baf file that is, and recompiled etc) so that the triggers for the movie/chapter transition were once again at the top of the script, and it seemed to fix the problem. Not sure exactly why the order would be an issue here; this probably goes beyond my understanding of Infinity engine scripts.
Edited by ithildurnew, 05 November 2014 - 02:50 PM.