Extremely Slow Time Machine Backup after upgrading to 10.8.3

Time machine backups are taking an extremely long time on my retina MacBook Pro 13 inch after upgrading to 10.8.3. It's taking many minutes just for a kilobyte to be backed up. I've tested transferring something to the disk and it's lightening fast so there's nothing wrong with the disk.
Is anyone having similar issues or know of a fix?

I had the same problem with slow backups. Called Apple 5 times and went through all the hoops checking plists, airport, and then erasing using my airport utility and the first backup of about 25-30 gigs went fine, but the second backup would take between 1-2 hours. By the time it was finished it was ready to do another backup.
After looking at community fixes I found that my Comcast Norton Anti Virus was the problem. Upon speaking for the 6th time to Apple I was told that should have been the first thing they asked, since antivirus programs check each file going to the time capsule. Even unchecking the scan external drives did not help.
I removed the Norton AV from my system and replaced it with the IAV from apple store (free) and my backups are back to normal. I timed a 100 meg using Ethernet/LAN and it took 9 minutes 32 seconds from clicking backup now, searching for backups, preparing backup, backingup, and cleanup. My Wifi connection on 10 megs took only 1 minute 29 seconds.
Now my backups run so fast I don't even see them working. Also the constant updates to Norton were casuing my backups to be 100 megs or more each time due to daily Norton updates. Now I get backups in the order of 10-20 megs - depending up what I have put on the machine. If I put music on it increases the size of the files installed.
I recommend anyone having this slow time capsule problem to turn off your full antivirus program no matter what you are using and watch the difference in speed. I am so happy! No more 2 hour backups and 45 minutes to 1 hour preparing backup! good luck

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