Problems after upgrade

[Decebal]

Because off org-mode I needed to upgrade Emacs. I now installed
22.3.1. Before I had a 21 version. I do not know wich one. I have now
a few problems.

I use flyspell. In the old version this used ispell, but the new
version wants to use aspell. I fixed this by putting into my .emacs:
    (setq-default ispell-program-name "ispell")
Now ispell is used again.

In my .emacs I have:
    (set-default 'ispell-local-dictionary "nederlands")
But this is not the dictionary used. When opening a buffer English
words are seen as correct, but Dutch words (nederlands) as not
correct. When I evaluate ispell-local-dictionary it says nederlands.
When I change the dictionary through tools->spell checking->change
dictionary to nederlands, ispell-local-dictionary still evaluates to
nederlands, but from then on Dutch words are seen as correct and
English words as incorrect.
What is happening here? And more important: how can I solve this?

On a side note: what are the differences between aspell and ispell?

Another change is that regions are not visible anymore. I put in
my .emacs:
    (transient-mark-mode 1)
and now it works again. Are the defaults changed?

The last problem is that previously the *GNU Emacs* buffer would be
killed with any action I did. (Or C-l if I wanted it to be killed, but
did not want to do something.) Now I need to kill the buffer manually.
What is happening here.?