Very strange issues with .ics meeting invites
I bought a new MacBook Pro a few weeks ago and had no end of iCal issues. Several hours at the Genius Bar led to the conclusion that my three-week-old iCal application was corrupt. So they reinstalled my OS, leaving me to restore all my files overnight. I also completely eliminated iCloud from the mix; what a ridiculously borked piece of malware that is.
This onerous fix solved all but one of my issues, and it is the most vexing.
When I receive a .ics meeting invitation and double-click on the email attachment to open and deal with it, iCal adds a completely unrelated meeting to my calendar from more than two years ago! I have to acknowledge that meeting request in some form, which then causes an email to be sent to the person who invited me to that two-year-old event!
On the other hand, if I receive the invite on my iPhone, and click on the .ics email attachment, the proper event gets added to my iPhone calendar and, when I synch with my laptop through iTunes, adds the proper event to my iCal calendar.
Any help with this would be greatly appreciated. My clients are getting tired of my random acceptances and declines of meetings long past.
Thank you.
MacBook Pro with Retina display, OS X Mountain Lion (10.8.1)