App crash - GoogleSyncDoc
That looks like a candidate, so if you run without it for a week (or more) and don't experience problems, perhaps SWMBO might consider removing it as the lesser of 2 evils.
All your temps look perfectly reasonable, so overheating doesn't look like a problem.
it might still be worth running memtest, just to ensure that there's no memory faults. Leave it running overnight, it takes a while!
SD