[Typo3] News record appearing in different news list and cache not being cleared

[Ricardo Scachetti Pereira]

    Hi folks,

    I'm developing a Typo3 website that supports several different 
working groups in an organization. Each group has its own subpage, with 
its own news items.

    I want to put a site wide news list in the homepage to display all 
news items from all working groups. For that I'm setting the starting 
point to the website root and setting Recursive to Infinite. However, 
when a news record is created in a subgroup page, it is not displayed in 
the homepage because its cache is not cleared. The working group page 
updates correctly, though.

    How can I get the homepage cache to be cleared when a news item is 
added anywere in the website?
    Thanks,

Ricardo