jimimac 60 wrote:
I think the TC disk activity continuing long after the backup had been completed occurred after the SL 10.6.5 update.
If you're willing to use a command in a Terminal session to learn more about what's happening, when Time Machine seems to be inactive, launch the Terminal utility, then type this command:
sudo lsof | grep "nameofyourTMvolume"
The letter "l" in "lsof" is a lower-case letter "L". Replace the value in quotes with the name of your Time Capsule's Time Machine volume, which in my case is "Data". If that volume name contains a space you'll need the quotes, otherwise you can omit them. You'll be prompted for your administrative password. In the resulting output the first "word" is the process that has open a file on your Time Machine volume. If you don't know what it is, do a Web search or ask here.