Goto Declaration doesn't work (for me) in RM 129.861 with JRE 1.6.0_51.

In addition, there are the following errors:

a) Find in Path doesn't pop-up dialog (same log output for this)
b) Syntax colouring is incomplete;
c) No Code Analysis is performed.

Invalidating the caches and restarting has no effect, nor does wiping out the .idea directory and starting again.
Ruby on Rails projects open and perform as normal.

Other notes: The problems don't occur when Xcode 4 is the selected version of Xcode, only with Xcode 5 DP2 and DP3. I don't have the command line tools for these installed since Apple's Developer site is unavailable.