Due to Wlah's recent moving, clicking the lil plus by Jagainu-kun in mylist now sends AOM into an eternal loop of the above messages, and needs killing. Did a del all but local and same problem, so might need bug fix/wait till next dump.
As a possibly related side issue, filtering mylist by 'all watched' leaves a bunch of series that do have all files still marked watched, though it does remove some that it should. No obvious pattern to what goes and what doesn't.
/me goes off to write AOM documentation: #1 When experiening problems with AOM, close the program, turn around three times, touch the floor, restart, and it should now work.