My b2evolution Version: 1.10.x
On my 1.9.2 install I have a 'home' blog that aggregates all the posts from each users individual blogs. When I ran the test upgrade to 2.4.2 everything worked fine but my home blog now says there are no posts to display. Is there a setting that I need to make to re-enable this feature for the 'home' blog?
In the 2.* world each blog can be an aggregator blog. I forget which subtab it is on, but go to Blog settings -> pick a blog then look at the subtabs until you see the one that has a field for aggregating other blogs into it. There you will be able to give it a comma-separated list of the blog numbers you want to aggregate.