  We address the influence of quantum corrections to neutrino masses and
mixings and discuss the possibilities to completely generate the flavor mixing
irrespective of any tree-level flavor model. Furthermore, we describe a new
class of vacua with a new minimum appearing in the standard Higgs direction.
The results hint towards a charge and color breaking global minimum and
therefore extend existing bounds at tree-level. Finally, we combine the
discussion of vacuum stability in the MSSM with the right-handed neutrino
extension. The supersymmetric version of the seesaw mechanism rescues the
potential and also does not induce further instabilities neither at the SUSY
scale nor at the scale of heavy neutrinos, as long as both scales are well
separated. Moreover, we resolve a degeneracy in name space.
