Hi,
I just installed gnome-shell in trisquel 5.5 I was using trisquel mini.
during the instalation of gnome is asked me what login manager I wanted and I
chose the gnome one (there can only be one unless you do some network stuff).
For the moment gnome3 looks really good. I find it less confusing than kde
and maybe a bit more confusing than unity. But time will tell.
I already costume it so will search ddg.com and not google as discussed here:
used http://help.duckduckgo.com/customer/portal/articles/255991 to do it.
and raised the bug mentioned here:
http://trisquel.info/en/forum/how-do-you-use-gnome-shell#comment-20428
in https://trisquel.info/en/issues/7197
I did not find reference anywhere else. It could be a bug that could be
raised upstream. I will coment.