After trying to sort out a bug in 2.64 and 2.68, I eventually fixed by using 2.69 (added objects properties were frozen).
But, the colours in 2.69 are washed out, and objects lit in lower versions seem either unlit or in shadow in 2.69.
Has anyone else noticed this?
Added objects seem to be lit properly on my build of Blender (using GLSL mode).
Are you using Multitexture, it might be that you need the lights on the hidden layers as well with that mode.
Not sure, haven’t ever had this when upgrading. You might have disabled Color management though(If its glsl at least), as that has a similar effect :).