用tw 的來源

Get:75 http://apt.ubuntu.org.tw edgy-security/multiverse Sources [14B]
Get:76 http://apt.ubuntu.org.tw ubtw/ Packages [4807B]
Get:77 http://apt.ubuntu.org.tw ubtw-edgy/ Packages [979B]
Get:78 http://apt.ubuntu.org.tw ubtw-testing/ Packages [8034B]
Fetched 11.4MB in 22s (516kB/s)
Reading package lists... Done

Get:51 http://archive.ubuntu.com edgy-backports/universe Sources [5295B]
Get:52 http://archive.ubuntu.com edgy-backports/multiverse Sources [1466B]
Fetched 6468kB in 31s (204kB/s)
Reading package lists... Done
W: GPG error: http://medibuntu.sos-sts.com edgy Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 2EBC26B60C5A2783
W: You may want to run apt-get update to correct these problems


換來源應該是要更新一下。