I have a Synology NAS that has a built-in iCal Server. We have been running 3 iCal calendars on it for some time now with no issues, and sharing them between our Macs and our iPad. With the recent release of OS X 10.8.2, the calendars on our iMacs have gone wacky. One of the iMacs was an upgrade from 10.8 and the other was a fresh install of 10.8 then 10.8.2 patch. On both machines, all 3 calendars are now colored wrong, and on the iCal calendar list (left side of iCal) the names show up, but are grayed out, so I cannot do anything to them. I have deleted and re-added them multiple times on both iMacs to no avail. Ironically, the iPad running iOS 6 is having no issues at all with the calendars. Has anyone else run into iCal issues since Mountain Lion was released and subsequently patched?