Hi,
maybe it is a bug, maybe a feature, but I think that lightmaps are
unusable on round things.
Look here:

There is no interpolation or smoothing between the lightmaps on the individual faces (I think) and this is rendering the smoothing useless. On genmeshes there are no lightmaps an so no shadows.... using hires meshes is also not an option (see left column).
Is there hope to solve this in near future? This really drives me crazy a I want to use CS more on projects.
Regards,
Carsten