Upgraded all my systems to Yosemite - however Time Machine backups to my Time Capsule are almost non-existent! So super slow - Im talking 5KB in a minute or so!! Previously with Mavericks this was working fine - much faster. Im using 5GHz AC WiFi, so that shouldn't be the problem. Its not a huge issue as I only do a manual TM backup once every month or so (I create clones of my drives usually), so my other option is to just connect with an ethernet cable when I perform the backup, although would like to get the WiFi backup working again.... All other WiFi performance is fine - not had any of the disconnection issues other are reporting with Yosemite.... Any ideas?