Getting an error when trying to update?????

[mysticaltopher]

When I run my update manager and click "check" for new updates it starts to download (48) new updates and at the end it gives me this error:

W: GPG error: http://packages.medibuntu.org intrepid Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 2EBC26B60C5A2783

and then no new updates appear?

Anyone ever seen this before? Any help would be great!
Thanks!

[Partyboi2]

Looks like you need to add the key. Open a terminal (Applications>Accessories>Terminal) and

sudo apt-get install medibuntu-keyring && sudo apt-get update

[mysticaltopher]

That worked....Thanks!!!!