gnome gnome2 gnome3 libgnome gtkbuilder anjuta: backward compatibility, time, portability

[Fabio Mariotti <mariotti fabio gmail com>]

Dear (lib)G guys,

I am a bit confused. Never the less I have 2 complex questions:

1) This is general. I am an old time programmer and I got fascinated
   from all this new GUI, RAID, Interfaces and autoconf stuff.
   Assuming that today is 2009/01/28: What would it be the best
   best RAID development environment for graphical application
   within linux? What is the best if I add as requests: backward compatibility,
   portability and stable during a long period of time?

 2) I wrote a glade/gnome application using anjuta. It is not ages ago.
     It should have been maximum 2 years.
     I installed F10 (Fedora 10: what happened to the core string?)
     And I started to have troubles. Right now it is just to fix a couple of
     of library paths.

     I am about to rewrite "fully" the graphical interface.
     I am worried  about: libgnome, gtkbuilder and the like.
     One reason I rewrite the application is some internal optimization
     but the second most important reason is that I did a too heavy gnome
     application: I used the gnomecanvas and I had to load something
     like 50000 gnomecanvas objects. You might understand why
     I need to rewrite it. I'll post my tech problem soon here.

    I might have an heavy gtk application (it is not
    a game, but a pure gtk application) which needs some tunes.
  
    The question is: Is glade3 stable enough?
     I'll need some graphical tunes: libgnome or gtkbuilder? [or what is the difference]
     Because I'll be working on these graphical objects..
    Gnomecanvas or drawable area?
    And I am the lonely programmer..
    long life widgets?

   I can rewrite the application now. But I will not do it again.
   Any suggestion?

  Thanks and sorry for the long boring post.
  Fabio