You are using LeeDroid on your HTC Desire and Facebook stopped working. This affects the native app and also FriendStream by HTC. Within the native app you can still update the stream but cannot read any messages. If you delete your native user account and readd it, it will give you an exception like this
( org.bouncycastle.jce.exception. ExtCertPathValidatorException: IssuerName(OU=Class 3 Public Primary Certification Authority, O="VeriSign, Inc.", CPS Incorp.by Ref. LIABILITY LTD.(c)97 VeriSign, OU=VeriSign International Server CA - Class 3, OU="VeriSign, Inc.", O=VeriSign Trust Network) of signing certificate. [javax.net.ssl.SSLHandshakeException])
Within HTC FriendStream it will give you a „service unavailable“ error.