After upgrading my Mac to Lion I was very disappointed: Avidemux, my #1 video app crashed upon launch. After a little research on the web, I found a post by eagle007 in Avidemux’s forums that explained that the crash was caused by a library used by Avidemux, libiconv.2.dylib.
He managed to get an updated version of the library and replace the one in the application bundle, thus making Avidemux work again. I really want to thank him for his awesome work.
In case his link goes down, I took the liberty to upload the file here.