My b2evolution Version: 1.10.x
Just upgraded upon advice here to do so, from 1.9x to 2.40RC2.
It seemed to handle the upgrade fine, but then I found in order for the URLs for categories, archives, permalinks to work I had to set the URLS to params. What's up with that? It worked with the "pretty urls" for the old blog just fine. Permalinks to the old blog postings are reinterpreted now, to come out in the params form, so they work, but we want our pretty URLs to work ! :-D
I am using the supplied index.php for multi-blogs. The only changes required were to point the way to config.php correctly (../conf/config.php)
As the public_html root of the webserver has B2evo as it's main folders, and combatwombat is a directory in it also, with the index.php in combatwombat.
The Domain name resolution resolves to the combatwombat directory.