I upgraded to an SSD (Crucial M4 256GB since you ask) and its great. As part of that I did a clean install of Mac OSX Lion and Mountain Lion, and then copied over a bunch of Apps, including Avidemux.
But it crashes on launch, and looking in the logs I see
Dyld Error Message:
Library not loaded: /opt/local/lib/libiconv.2.dylib
Referenced from: /Applications/avidemux2.app/Contents/Resources/lib/libxml2.2.dylib
Reason: Incompatible library version: libxml2.2.dylib requires version 8.0.0 or later, but libiconv.2.dylib provides version 7.0.0
The easiest way to fix this is copy a new version over from the downloaded disk image, and then delete these two files: libxml.2.dylib and libiconv.2.dylib