The latest Maps version from Nokia Beta Labs, comes with a bug.
Nokia Maps Suite 2.0 (3.00_12wk9_b05) needs Nokia Maps 3.08 preinstalled!
If you are using my CFW without maps preinstalled (or you did a hard reset (also on ofws')) you need to install Maps v3.08 first.
If you install Maps Suite right away, you will have a strange bug, that closes every Qt-App when pulling down the topbar.
Remember, that Maps Suite is still beta... I reported this bug to Nokia, hopefully they fix it for future versions.
I will link this post to the bug list of my CFW. Even if its not really a CFW problem, its an important information