Wondering if anyone else can reproduce this kind of problem? I dual boot windows 7 and ubuntu 13.04 with QGis on both. Have updated QGis to latest on both, and created a layer in my project in 2.2 in Windows (voronoi polygons with 5 data layers). When opened in ubuntu it displays fine, but if I edit the style at all the layer disappears.
EDIT: Checked in 2.3 in Windwos 7 and had the same problem, so it's a problem with master not ubuntu/windows. Title changed accordingly.
Link to imgur album explaining it. Image sequence: 1: version. 2: appearance when opened fresh. Looks fine. 3: details of that layer: 25 equal counts on the first data layer. 4: changed to pretty breaks and hit apply - layer disappears in background, data field now blank. 5: but no blank data field present.
Reminds me of similar bugs I've found before e.g. blank data fields