I don't much about the " IC Station 2007.2 on Solaris " but to select objects there will be two options
a. Full Mode
b. Vertex(partial) Mode
There might be a bindkey to change these modes, by mistake you are pressing that key and it enbales the PCell layers selection.
Unfortunatly it's not a fulll/partial mode issue. Even if I would be in partial mode I should not be able to select
any parts of a pcell, beside something like stretchhandles maybe ... The problem seems to to be limited to
a limited set of cells,, e.g substrate and well contacts are fine, transistors and metal-metal contacts are not.
That makes me more and more believe that this has to be a PDK problem, not a problem of IC-Station.
Nevertheless I'm looking for possible solutions as those guys at the foundry seem not to be the fastest
if it comes to answering questions ...