It is obviously available also for amd64 (it is architecture independent actually).
Probably it is the bug in Software Center that it does not support the refresh command from apturl. Manually running sudo apt-get update should workaround this.
It is obviously available also for amd64 (it is architecture independent actually).
Probably it is the bug in Software Center that it does not support the refresh command
from apturl.
Manually running sudo apt-get update should workaround this.