This problem can be reproduced in all mantis builds. To reproduce:

1. Program Files -> Settings -> Control Panel
2. Double click on "Java Plug-in" icon
3. Click on "Update" tab
4. Click on "Advanced..." button
5. Under Frequency
a. Click on "Daily" radio button, you will see update.advanced_desc1.text
ex: Perform scan every day at 2:00 PM
b. Click on "Weekly" radio button, you will see update.advanced_desc2.text
ex: Perform scan every Sunday at 2:00 PM
c. Click on "Monthly" radio button, you will see update.advanced_desc3.text
ex: Perform scan on day 1 of every month at 2:00 PM

On the file deploy_ws/src/plugin/src/share/classes/sun/plugin/panel/UpdatePanel.java
it looks like the AmPmString position has been hardcoded.

        DateFormatSymbols datefmt = new DateFormatSymbols();
        ampmStrings = datefmt.getAmPmStrings();
        weekDays = datefmt.getWeekdays();
        atComboBoxText = new String[24];
        atComboBoxText[0] = "12:00 "+ampmStrings[0]; //start with 12AM
 
The fix may be to use SHORT format from DateFormat class. See: http://java.sun.com/docs/books/tutorial/i18n/format/dateFormat.html

This affects Asian languages such as Korean, S.Chinese, T.Chinese and maybe Japanese.