[jasecorn]

Would having the trailer link in the nfo and also a local trailer, stop a trailer from playing? Some of mine are not playing and some are.

Also, do you have to refresh the movie in XBMC for the trailer to be recognised?

I was having this problem with local trailers, and discovered it was skin specific. On digging further I discovered that some skins do not like commas in the movie folder name. All my movies starting with "The" for example, were named, "Movie name, The". When looking at the logs, some skins were stopping at the comma (Neon skins and variants for example).
I got around this by renaming all folders to remove commas, and then using metadata to allow them to still display with commas in XBMC.

This may not be your problem, but you never know

Jason.