Help with Contacts

[Eduardo Hauck]

So I've recently started using Xubuntu and Pidgin with it. It worked 
perfectly for me, connecting to both MSN and Facebook (XMPP).
But after a day or something of use, something odd happened. The 
facebook contacts starts to appear all offline in my buddy lists, even 
when they were online on facebook. And if someone start a conversation 
with me, he immediately appear as online on Pidgin and the chat message 
popup, but the remaining online contacts (on facebook) keep appearing 
offline on Pidgin.
I'm using the 2.10.7 one.
Any ideas?