Time Machine turns itself on after my Mac Pro wakes from sleep (every time)

Hi,
I have a 2009 Mac Pro and it currently has Lion on it (10.7.4), but the problem I am about to explain started when the machine was running Snow Leopard, so it doesn't appear to be an OS-specific issue.
I do not currently use Time Machine, I use Carbon Copy Cloner and some online backup solutions to handle backups. I did use Time Machine for a short time on this machine just after it was introduced, but I didn't end up using it for long and the external drive I used for the backups is no longer in service.
The problem is this:
I have Time Machine off and I have all of my drives (I have 4 drives in my Mac and an external drive) set not to be backed up for good measure. Time Machine will stay off like it should except in one instance. If I put my machine to sleep, when my Mac wakes, Time Machine is instantly turned on and I get a warning telling me no backup drive has been selected and that I should pick one. I go into the Time Machine preferences and turn it off. It will remain off (I've checked the preferences to be sure) until the next time the machine is put to sleep. Time Machine will remain off, even through reboots. It is only waking from sleep that causes this.
I've tried zapping the PRAM, getting rid of the Time Machine preferences and even logging into a new, unused user account and testing it from there and the problem continues. This is really starting to annoy me. I wouldn't mind having TM on, but having to click through the warning every time my Mac wakes from sleep is frustrating.
I don't want to have to buy a new external hard drive and let TM backup to the drive because, as I said, I've got my backup solutions handled already and I'm not willing to put yet more money to use a feature I don't need right now.
I've done searches online and asked around and no one has been able to help me yet. So I thought I'd try here.
Anyone have any ideas?

Do you see a wake reason in Applications>Utilities>Console?

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    This causes problems for IPv4 as well because apps like Firefox and Safari try using the IPv6 DNS servers and give up before falling back to the IPv4 servers.  So this problem breaks more than IPv6.
    Is this a bug or do I have something misconfigured?
    Thanks.
                                   --Tom

    I see this (sort of) behaviour as well. When I look into the tcp/ip tab of the network (system prefs) I see
    fe80::1:1 as router, that is why v6 stops working. After turning v6 off and on again the correct router IP appears.
    NB. this is on wifi
    Rudi

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