iCal attached file gone wrong

[Radmacdaddy]

I use file attachements a good bit in iCal, but recently, when I go to view them I get this:
http://emberapp.com/radmacdaddy/images/screen-shot-2010-02-22-at-11-36-49-am

Seems the links are messed up. What might correct this other than having to rebuild the whole series of calendars.