I didn't check since this problem happened because we installed versione 3.2.0.6 and right afterwards versione 3.2.1beta. Since before everything was working correctly. Now when clicking on a group picture, I'm not redirected to the group's page but to a generic:
www.sitename.com/component/community/
Same thing happens when I click on one of the latest pictures. Apart from upgrading Jomsocial and configuring Jreviews we didn't do anyother major change.

Hi Adriano,

your issue caused by menu itemID issue. please find any menu items with jomsocial "all groups", for trashed or unpublished or published. delete and empty it from trash. after that re-create that menu.



Regards,
Albert

We found out that the problem was related to all our menu items being unpublished after uninstall. Given that it's a frequent problem, you should mention it in your upgrade documentation. The problem was the same one described here:

http://www.jomsocial.com/forum/technical-issues/18116-component-com-community-doesn-e-exist