Switch from Ubuntu to Fedora

"Never change a running system"

Ubuntu worked (for me). Why i wanted to change ?

• my UMTS modem was not really supported by the kernel.
• i missed many basic apps (yes, i can download it via the internet, but do i know all the names of the packages ?)
  
• i got my ordered Fedora DVD

I created a backup from my home directory and installed Fedora.
Now the real pain begins. Stuff that have worked in Ubuntu won't work in Fedora.

• "Launch Calculator" key on the keyboard
• Evolution won't import my old addressbook.
• Apps crash
  

The only thing that works without a problem is my UMTS moden.