Hi all! I'm currently using 3 different calendars: personal, work and a shared one with my GF. Since I've installed Mavericks GM my work's calendar changed from red to purple. I tried to change it to red but after a while (minutes) it changes back to purple. Same if I change its color from my iphone or my ipad. I tried also to change it form iCloud.com but it seems that I'm not allowed to do this (if i click on the red dot nothing happens). Anyone knows why?