Fedora 15 works very well on Sony YB (AMD fusion) laptop, including sound, graphics, network, bluetooth.
After updating NetworkManager from:
NetworkManager-0.8.999-2.git20110509.fc15.i686
NetworkManager-gnome-0.8.999-2.git20110509.fc15.i686
NetworkManager-glib-0.8.999-2.git20110509.fc15.i686
to Next update 0.8.999-3:
NetworkManager-0.8.999-3.git20110526.fc15.i686
NetworkManager-gnome-0.8.999-3.git20110526.fc15.i686
NetworkManager-glib-0.8.999-3.git20110526.fc15.i686
Fedora Bug: 708445
it is not effecting all machines, but many people reported that same issue.
you need to download packages (on other machine) and update on effected machine.
Another NetworkManager Crashing issue with same version is Bug 708626