Kompozer appears to install ok using either of the installers but as soon as one selects View>Show/Hide it crashes.
This also happened in LM6.
I have reverted to LM5 (Elyssa, which is my favorite so far) as this does not have this problem.
There are several reports of Kompozer crashes on the Ubuntu site.
Perhaps this application should be remove from the installers until its problems are resolved as something like this can give Linux a bad name which it certainly does not deserve.
Ardent Linux user