I upgraded from 5.0.12 to 5.0.14 and am now seeing that my box takes twice as long to finish booting.
Java now seems to take up 100% of my cpu for 2-3 minutes and then all is well.
What I run;
RHEL 5.3 (2.6.18-128.1.1)
Zimbra open source 5.0.14
Zimbra seems to be working normally but I just find the new behavior odd.