I just installed the Studio 11+ upgrade for Studio 9 that I had bought sometime ago.  Now I am having the following problem.

 Have have some AVI clips that play fine in RealPlayer or Windows Media etc but when I import them into Studio 11+ and play them or burn them to DVD, the longer they play the more unsyncronized the audio and video become and is very distracting.  These particular clips are an upclose of someone singing and it is quite disconcerting to have to watch this way.

Anyone have any suggestions on how to correct this issue?  I didn't have any of these problems with version 9 that I used before.

 Thanks