That fix doesn't really fix all the issues.
After applying the fix, the address book list shows, however, if you click the address book repeatedly, I get the search view again and then the list view... and so on. It seems to be random.
And often, when you select (ALL) from the alphabetical list, I get this:
"There are no browseable address books." (and of course there are, and even if a letter's list was empty, it still should show the empty listing).
This seems to be a bug introduced by cPanel and is not inherent in Horde.
Cheers,
Phil