resolving dependencies in aptitude

[Hendrik Boom <hendrik@topoi.pooq.com>]

Recently, with wheezy, when I try to upgrade using aptitude in teh 
interactive interface, I get a lot of potentially unsatisfied 
dependencies.  (I use u to update the package list, then U to make a set 
of upgrades) Aptitude usually suggests I remove a lot of packages.  gnome 
and its minions are usually on the list, which is drastic.  I end up 
exploring alternatives, but there are often no acceptable ones.  I seem 
to remember there used to be a way to upgrade where it would only 
consider packages that could be upgraded without removing stuff (except 
for packages that had become obsolete or had nothing depending on them 
any more, of course).  

Is there any way to get that behaviour now?

-- hendrik