The child process dies if the NOOPS get flushed and a UIDL check is made after that.
Error message as seen in debug mode is:
ERR: Attention: child with pid 11209 died with abnormal termsignal (11)! This is probably a bug.
The process then has to be restarted, and the old mail folders continue to exist.
2009-05-19 14:21:20 UTC in P3Scan