I still get rid of the gvfs messages with an udev rule in which I name "99-fuse.rules".
$ ls -l /etc/udev/rules.d/99-fuse.rules
-rw-r--r-- 1 root root 54 oct. 4 20:21 /etc/udev/rules.d/99-fuse.rules
$ cat /etc/udev/rules.d/99-fuse.rules
For the power problem, on what machine is that ? Laptop ? Desktop ? Have you tried an option "acpi=force" in the kernel command line ? I had blue screens as shutdown endings in my Openbox machine, a pair of months ago. XD
I got rid of them with that option. (I still have it, and the problem didn't reappear).
I can't help for the 3 as I don't use gnome. I suggest you try to search what package "libgnomebreakpad" can belong to ?