Hi Uwe,
I had the same problem as you with the marillat packages. But it
seems like the problems is not with the installation packages but
rather with Firefox. Here is what I did to get it work (Using
firefox 1.0.2):
1. In Firefox, remove pdf plugin from Preferences -> Downloads ->
File Types -> Plug-ins
2. (To be sure I removed the pdf association also from Preferences ->
Downloads -> File Types also, don't know if this is necessary)
3. Restart Firefox
4. Point to pdf file on the web. Firefox asks which application
should be used. Use /usr/bin/acroread
That's it! Simple and magical solution...
Good luck,
Bengt