Blender 2.68: Usability

User Interface

Display menu items key shortcuts in the button tooltips. (r57172).
Drag-Toggle now allows all layers to be set at once. (r56748)
Color picker now supports 3 digit hex colors like HTML, e.g. #123 becomes #112233. (r57135)
Units, display 0.5mm rather than 500um, nicer when dealing with very small sizes but not microscopic (r57149)
Double click now selects entire words (like on file path segments) (r57280)
File-selector now maps back and forward history to back and forward buttons on a 5 button mouse. (r57285)
For users without middle-mouse buttons, you can now use Circle and Border de-select by holding SHIFT. (r57577)
Expanded control of enum properties in bitflag mode now follow other similar controls behavior (i.e. click only select one item, shift-click to (de)select several ones). See e.g. transform manipulators selectors, in the header of 3D views (r56706).
Icon-only expanded enums where still using the label to compute their width, now they just take room needed by the icon (r57576).

Vertex Weights Panel

Reworked Weight Paint panel and added make it work in weight paint mode when vertex selection is enabled. (r57468)
Weight tools such as limit-total, levels, clear - that operate on many groups can now select from active/deformed/non-deformed/all. (r57005)

Added a mask modifier for sequence strips (r56582).
Fix naming of strips when adding a bunch of video files at once, previously all strips got the same name (from first file name), now each get a name matching its underlying file (r57610).

Auto indent for multi-line Python statements in the Python console. (r56558))
Support for storing text styles in themes (r57275).
Transformation Constraint now allows applies rotation offsets too (like for location) (r57309)
2D painting now supports texture masks and does masking more consistent with projection painting. (r56699)