No comma and space on who's online usernames
 

I just upgraded to the current vbulletin and my members online in the who's online section of the forum do not have commas and a space after the comma.

Example.

It looks like this right now:



username1username2username3username4username5

But it should look like this:

username1, username2, username3, username4, username5,


How can I fix this? I tried the default vb and the member's list is also showing this error. Thanks.