Hi - I seem to have encountered the most bizarre problem today. Wondering if anyone has had this happen and if there is any easy way to restore it? I clicked on iCal (which I had been using throughout the day) and got an error saying the architecture was not supported on my computer. My dock icon still showed the correct date. Relaunching the dock changed the icon to the unsupported icon. So I ran file /Applications/iCal.app/Contents/MacOS/iCal out of curiosity and got No such file or directory. Turns out, the iCal bundle doesn't have the MacOS folder. Resources is there but that's it. Here's where it gets even stranger. A quick ls shows last modification date a few days ago at the time I ran the 10,5,3 update. So obviously, some time since then the MacOS folder got deleted, but there is no change to the timestamp on the application folder (iCal.app) or even the Contents folder. I've used iCal for several days without any problems since that update until just today. As a heads up, I have no 3rd party modifications to the system or anything. It's a stock MBP with mostly just Apple's apps and a few other mainstream commercial apps (again, no strange settings). The computer hasn't had -any- problems either with any apps (iCal included) crashing or acting strange. So I don't really care if my calendar data is lost; it's all backed up just fine, I just want to get the application back. Any ideas there and -any- thoughts as to how a bundle changed with no notice or timestamp changes?