Don't know if this issue has already been addressed - the "Goto Declaration" on most of the method doesn't work in Rubymine 3.1. It works fine in 3.0.1.
Since I constantly navigate around in the code this is a major drawback for me to not use 3.1 though I like the new features like completion, showing the correct git branch, better memory mgmt. etc.
Please let me know if there is a patch or a new build available with this issue fixed.