Problem in multisite upgrading to 4.7.2.

Firts of all the upgrade of 4.6.6 to 4.7.2. for the administrator user.

After that I check more in details and I discover a estrange problem. I explain.

I have a multisite installation with 5 sites, 3 of this sites are in a share database with prefix and the other 2 are in a single database.

The 2 site in a single database function OK after the upgrading of 4.6.6 to 4.7.2 but the 3 sites with share database shows the "Welcome to your new Drupal website!" in the front page. In all cases I have a several posts and users created.

At the same time I have detected than this situation only appear withs the unregistered users (or logged out users). This users are in rols than have disable the administration of nodes in the acces control. (for exemple in Anonymus users and autinticate user).

If I enable this capability, the front page is OK and the problem dissapear, but in this case I have another problem because I give administration capabilitys to rols than I don't want them to have.

Some one can help me what can I do????

Thanks in advance