When I view a list of topics I see the following header at the top
Link to The Hive on the left and link to the main site on the right.
When I view the topic itself, I get a header with the little TPM block on the left, but it links to the Hive and there is no link to the main site.
I think the header with both links is the better option and would like to see it in both places. For awhile yesterday I thought it was doing that, but today it seems to be back to the old way which is what made me finally mention it.