I've never had the movie trailer application mess up, but whenever things are acting weird a fresh install works wonders. You can back up your XBMC/UserData folder and then copy that over a fresh install. You can use the T3CH Upgrader 1.6 script or go to
http://t3ch.yi.se/ and download the latest build and ftp it to the box.
Sorry if it isn't the answer you were looking for, but I saw that no one else had replied and wanted to give some kind of answer.