Chinds85 sent along the following information after experiencing what he terms a "game stopping bug". Apparently this has been reported widely but it is uncertain who exactly is working to solve it. Here's his report:
A large number of people are having issues with the official campaign,especially regarding cinematics and worldmap transitions. The official campaign has not been playable for many people, as these bugs often make it impossible to procede any further in the game. Though it is not an official explanation, it seems that these bugs are often the result of a malfunctioning cutscene sequence, resulting in multifarious issues, including worldmap transitions that dont work. Though there are work-arounds for some of the issues, many remain unresolved.
If you are experiencing similar problems, please take time to post on Atari's NWN2 Support Forums:
http://www.ataricommunity.com/forums/forumdisplay.php?f=502
Also, here are links to several forum threads that will provide more detailed information on what these bugs are and where they occur:
(WARNING: Some links may contain spoilers.)
http://nwn2forums.bioware.com/forums/viewtopic.html?topic=508249&forum=116
http://nwn2forums.bioware.com/forums/viewtopic.html?topic=509480&forum=116
http://www.ataricommunity.com/forums/showthread.php?t=547491
http://www.ataricommunity.com/forums/showthread.php?t=547689
Thanks, Chinds85.
