Sync issues with iCal/MobileMe/Google

Question

Seems like I've come across something rather sticky....
History
I have a MacBook Pro and an iPhone 3G. For the first few months of having the phone, syncing worked like a charm... no complaints. I then decided that I needed to get my Appointments etc up online for my colleagues to view as I travel out of the office so went into my Google account and activated the calendar feature, adding GoogleMail as a new calendar in iCal. No problems so far.
Things seemed to work fine for a little while. A few weeks later (or long enough that I didn't see any correlation), my iPhone sync reverted back to an earlier state of my iCal calendars, including deleting a couple of new calendars I'd added in the meantime. Nothing was affected on my laptop btw. Google had gone completely berko as well. So basically no new additions in iCal were turning up on my phone.
I then thought, hey I'll try out MobileMe and see if that solves things. Answer = nope. After setting up the account on the iPhone, this old "ghost" calendar decided that it would also sync to MobileMe as well as the iPhone. When I added new things online or on the iPhone, they would both update each other, but never iCal on the laptop.
So I'm sitting here today pretty much over it, trawling the net for answers. I come across a post that says to simply delete the following folder: user/library/calendar - btw i did backup before i did this!
I do this, empty trash, then reopen iCal. Blank Canvas!
And then, after about 20 secs, the old "ghost" calendars pop up out of nowhere, with everything intact from about 2 months ago. I turn off airport, disconnect ethernet and repeat the process. Same thing happens... so somewhere on my laptop is a buried file that is finding it's way into iCal, and also overwriting all sync data just for iCal. Address Book and Mail seem to be doing just fine with MobileMe.
The reason I guess why I think it's Google interfering (wouldn't be the first time) is that it's the odd one out when the "ghost" returns... I would've thought that deleting the Calendars folder would wipe everything out, but I'm sure when I went through the original GoogleMail thingy, it would've buried something somewhere at the time.
So any help would be greatly appreciated. It really is driving me absolutely batty!!
Cheers

Answer 1

And it looks like I've just answered my own question!!
Just found this post online, followed all the steps, rebooted, sign out then signed back in to MobileMe, re-registered the laptop and Bob's-your-uncle.
So if anyone needs help, just follow these easy steps....
The report shows that you have some data corruption. You should be able to resolve this by resetting Sync Services:
* Open iSync (in /Applications)
* Go to preferences
* Click Reset Sync History
* Try syncing again
If that fails to resolve the issue, try replacing the database:
* If you haven't done so lately, make a backup of your iCal calendars (iCal File menu > Back up iCal)
* Quit out of all open programs
* Make sure that nothing is syncing (Spanning Sync, .Mac, iSync)
* Move these two folders to the trash:
~/Library/Application Support/SyncServices (~ refers to your home directory)
~Library/Application Support/iSync/SyncLocalCopy (~ refers to your home directory)
* Restart
* Open iCal and give it a few minutes to write out the new database
Please let us know if that doesn't address the problem or you have other questions.
That didn't work in my case, so I ran another report (contained within the Spanning Sync Application) and sent it to them a second time. What they suggested next fixed the problem for me.
I'm still seeing the same errors in the new report. Lets try clearing your calendar cache:
* Quit out of iCal if it's open
* Delete this file:
~/Library/Calendars/Calendar Cache
(~ refers to your home directory.)
* Delete the contents of this folder:
~/Library/Calendars/Calendar Sync Changes/
(~ refers to your home directory.)
* Open iCal
* Wait at least five minutes until after it finishes "Upgrading Calendars"
* Sync!