Cydia Release.gpg error

[satointl]

GPG error: Untitled Document
xena Release: Unable to read
/etc/apt/trusted.gpg.d/ - open dir (2:
No such file or direrctory)

Failed to fetch
Index of /dists/stable/
/main/binary-iphoneos-
arm/Packages.bz2

Failed to fetch
http://cydia.*************/./Package
s.gz HTTP/1.1 404 Not Found

Some index files failed to
download, they have been
ignored, or old ones used instead.

What does this mean and please help me!

I'm using iPod Touch 3G 3.1.2 jailbroken with Blackra1n

[moraru]

same thing on 3.1.3 jb snowbreeze (+blacksn0w)
+apt.saurik.com is dead