No such thing occurred. At least not to any of the N800s in our household, which didn't quit performing when Maemo 5 came out.
Maemo is rough on the edges. It is a bit dangerous. It is open to experiments.
These were some of my thoughts when I'm thinking about Maemo 5, pushing Maemo forward, and making computers. We are not making a new iPhone or Symbian here. They both exist already and are pretty good. So no need to replicate them.