Hi,
I received no alerts except that the second time it "ran" the Incrementals job it showed the time it ran as 1256480 hours and it tried to run all the other jobs afterwards, wich it marked as "missed" because the first job was running for a million years, literally, according to the software. I had to kick every job off manually to get them back on schedule again.
I called BE support and the guy could only tell me that "maybe the database had become corrupted", although he didn't see anything conclusive. He had me do a database repair and said to call back if it happened again.
Not a very good answer, so I'm still not sure what the heck happened.