I noticed that the summertime switch, which breaks some alarms not only affects the alarms. Recently on a trip to Europe, I also noticed that photos taken with Hipstamatic also don't accept the 1 hour difference. So if you take pics with the normal camera app and Hipstamatic at the same time, the Hipstamatic ones will be 1 hour out. haven't tested other apps yet.
15"MBPro 2.53GHz, 4GB RAM, 320GB HD, Mac OS X (10.6.2), 23"Apple Display, ext MyBook + Lacies, iPhone 3GS, iPod 2G, 4G, 80GBclassic