QGIS » QGIS Application

That's a pretty serious regression: it's impossible to add data-defined expressions to the symbology of a composer {rectangle, ellipse, triangle} item.

Steps to reproduce:
1. Create an empty project
2. Create a composer
3. Add a rectangle item to the composer
4. Open the item's style property via the 'Change...' button
5. Click on the 'Simple Fill' layer, and open the 'Data defined property...' window
6. Try to click on the [E] button of any of the fields, you'll notice it doesn't do anything (i.e., broken) when it should open the expression builder
7. Try to enter a valid expression in the Color field (e.g. '150,150,150,255'), you'll notice it doesn't validate (i.e. broken) when it should

Hmm, hoping this can be fixed before 2.4, that breaks custom legends and atlas-driven symbology.