Pycharm 3.4 (fresh install) will not run on Yosemite with Apple JDK 1.6:
Crashed Thread: 32 Java: AWT-EventQueue-0
Dyld Error Message:
Symbol not found: _CGContextSetAllowsAcceleration
Referenced from: /Library/Java/JavaVirtualMachines/1.6.0_65-b14-462.jdk/Contents/Libraries/libawt.jnilib
Expected in: /System/Library/Frameworks/ApplicationServices.framework/Versions/A/ApplicationServices
There are advices to switch to Oracle JDK 1.7 but since apple 1.6 is recommended I would rather stick with that version.