A new version of the Arduino IDE (1.6.3) is released earlier this month and is available for download.
The Arduino IDE 1.6.3 is a bug fix release: after having released 1.6.2 with new libraries and cores managers, Arduino IDE received lots of useful feedback and fixed a handful of bugs.
Fixed some impolite crashes on some Linux distributions
Bundled AVR core files are back into hardware folder
Fixed “https” links not working on Windows and Mac
Added new Arduino Language color highlight
Introduced a way to help old cores to work with newer IDEs without having to upgrade their code
Advise of duplicate libraries after compiling. Thanks @PaulStoffregen
Just a quick note on the Arduino Language color coding, new IDE assigned different colors to the three Language categories listed in the Arduino Reference. Structure keywords are green, variables are teal, while functions stays orange. Arduino IDE team did a lot of user testing on these new color highlights, and it is helpful for beginners to have a bit more of a visual cue when starting to write code.