Have you noticed that you are only seeing updates in your newsfeed from the same people lately? Have you also noticed that when you post things like status messages, photos and links, the same circle of people are commenting and everyone else seems to be ignoring you?
Don't worry, everyone still loves you and nobody has intentionally blocked you. The problem is that a large chunk of your friend / fan list can't see anything you post because the "New Facebook" has a newsfeed setting that, by default, is automatically set to ONLY SHOW POSTS FROM PEOPLE WHO YOU'VE RECENTLY INTERACTED WITH OR INTERACTED WITH THE MOST (which would be limited to the couple of weeks just before people started switching to the new profile).
So in other words, for both business and personal pages, unless your friends / fans commented on one of your posts within those few weeks or vice versa - you are now invisible to them and they are invisible to you!
Scroll down to the bottom of the Newsfeed on your HOME page and click on"Edit Options".
In the popup, click on the dropdown menu next to 'Show posts from:'
Select "All Of Your Friends and Pages" and then click Save.
Note: This is the fix for personal pages, but I am unsure of whether or not the business pages are set up the same way.
Simply posting an update about it won't do any good because lots of your friends / fans already can't see your posts by default. You'll either have to send out a message to everyone on your list pasting a link to this page (which I'm not even sure business pages can do and is a rather tedious method) or you can also tweet about it hoping that most of your fellow facebookers are also on twitter. Clicking the "Like" button on this post will also help the people on your list be able to find this information easily.
PLEASE FEEL FREE TO SHARE THIS PAGE WITH AS MANY PEOPLE AS YOU CAN SO WE CAN TRY AND GET EVERYONE INFORMED AS SOON AS POSSIBLE. Anyone who isn't seeing your posts right now will never see them until they have changed their settings as explained above.