some numbers are display with "x,000" in some languages.
For example under Preferences > Mail > "Check for new mail every: "
In English its: "2 Minutes"
In German: "2,000 Minuten"
I tried several languages:
Problem occurs with: German, Danish, Italiano
Occurs not with: Englisch, French
I thougt it would be something in /opt/zimbra/jetty/webapps/zimbra/WEB-INF/classes/messages/I18nMsg_de.properties
But I didn't found something.