Can't find invites iCal says I have

I have a calendar set up to retrieve my work calendar and display it on iCal. It's showing there are 4 meeting invitations that haven't been responded to (but when I check my calendar at work, it's not showing any outstanding invitations).

Is there any way in iCal for it to show me the invites it thinks I have so I can clear them? Right now, my iCal icon in the dock shows 4 unanswered invites and I want to clear them. I checked my calendar for the next three months or more and there's nothing there.

I just want to see what it thinks I have so I can clear them. Or just clear them.

Thanks in advance!