Don't know if the upgrade is causing this problem or if there is another reason: i have a setup as described below, after upgrade (with potentially having deleted a hack in a modified file) it is not working anymore. When i want access the second collection (http://kerosinsteuer.wald.org/news/), i get an 'Error 404: NOT FOUND!'

Question 1: are there changes between this two versions that explain the failure?

Question 2: how do i solve the problem?

@mgsolipa wrote earlier:

@ramadama your different blogs approach is correct. Just keep the sub-domain collection URL pointing to its root: http://sub-domain.example.com/. For the second collection you can use a stub (http://b2evolution.net/man/stub-file) file, so try this:

1. Create a folder info in the root directory of your site.

2. Copy & paste index.php and .htaccess to it.

3. Open info/index.php and do the following:

   1. Modify the first statement to correctly find the config.php main file. i.e.: change it from: require_once dirname(FILE).'/conf/_config.php'; to require_once dirname(FILE).'/../conf/_config.php';
   2. Add the ID of the collection you're pointing to. You can find a line with the following text:
      //A blog has been requested... Let's set a few default params:
      $blog = 99; // Replace 99 by the ID of your own collection
4. Set the URL Relative to baseurl or Absolute URL. In any case, the final URL should be something like: http://sub-domain.example.com/info/

That might do the trick. Please let us know.

Regards!