Facebook issue: "Unknown" users.

[Espo]

last night I had to reinstall facebook cuz it froze, and then it failed to install again so I had to sync it with iTunes. After I installed it, on my newsfeeds and chat it shows several users as "unknown" so I don't know who it is. Anyone else have this issue?

[Nipz]

Does it to me aswell.

Even thought i know the people etc...

[SnowLeopard2008]

try turning it full off and on again. that fixed a app crashing problem for me.