Steps and Reproduce:

1. Go to Administration > System > User Interface > Look and Feel
2. scroll to Date/Time Formats section
3. change the Complete Date/Time Format to dd/MMM/yy h:mm:ss where it included seconds.
4. open one of the issue to see the changes.

Expected Result:
The complete date will included seconds in the Dates correctly, like 23/May/07 11:55:47

Actual Result:
The seconds is displayed but it shows "00" (double zero), like 23/May/07 11:55:00.

Notes:

• If you mouse over the date the seconds will show correctly.
• changes in Administration > System > General Configuration > Advanced Settings would not correct it.
  • jira.date.picker.java.format
  • jira.date.picker.javascript.format
  • jira.date.time.picker.java.format
  • jira.date.time.picker.javascript.format
• Tested in JIRA 6.2.5 the seconds is showing correctly.