I had the same problem.
However deactivating all plugins at once did help me - saving started to work.
Then I started reactivating them by parts and found out the culprit was in my case
Find Me Elsewhere - Version 1.2 | By Wpease Team.
I have verified it by reenabling all plugins but this once, then this one and it was indeed the cause.
It's actually just a bunch of links on site view, not sure why it had to disable Suffusion saving, perhaps a conflict, anyway, I'm glad it's sorted, thanks for this topic and perhaps my addition will help to someone else.
Glad it wasn't something really useful.