I upgraded to Yosemite yesterday, and just now I got a Time Machine alert
Disk is Full
although there are 350+ GB on the backup disk according to Finder. It said it had deleted an old backup (boo).
Just now I did a manual backup (from the TM preferences panel) and it backed up 2 MB to the free 350GB disk and all was fine.
What gives? What can I do to make TM happy?