Help, help, help!!!

[Damian Dobroczynski <damian dobroczynski put poznan pl>]

Nautilus is dead & my icons on the desktop gone!

But this is only the beginning of the story. Nautilus stopped working after 
n-th crash of my GNOME environment. For several months GNOME has been hanging 
without warning!!! Verbosely, everything stops (including kernel I think, 
because I couldn't reboot my computer via net (telnet) --- tcp is dead!). The 
whole system stops responding. This happens only during _GNOME_ session! KDE 
sessions are OK till some program based on Mozilla engine runs. This moment 
is very risky because THIS happend several times during KDE session. I can't 
remember if I did something special --- THIS may happend any time, any place 
(for ex. during clicking on a link, or writing something in Emacs). 

Some words about Nautilus: icons are gone, the program launched by hand 
starts working and nothing more. Nothing popups, no windows, no messages in 
var/log/messages, no messages on terminal (besides "GnomeVFS-WARNING **: 
Unable to convert MIME info from UTF-8 to the current locale pl. MIME info 
will probably display wrong").

Evolution is nearly dead (this may be related to the Nautilus silence): 
everything is ok till I browse a file on may IMAP account. Then, the program 
stop working. Hangs.

I beg for help. I do not want to reinstall everything (which probably will 
not help). Some missing files? After the computer hangs I have to reset it in 
very brutal way... I did it "n" times...

Summary:

Nautilus keeps silence, Evolution hangs, GNOME stops working without direct 
reason. KDE is very stable till a program based on Mozilla engine is 
launched. Then it may be unstable (I mean it may hang any time).

system info:

PC Pentium IV, 1.6 GHz.
Mandrake 8.1
Ximian-GNOME 1.4.x (the latest)
dynamic IP (this does not matter, because when the IP was fixed all of the 
calamities happened also)
XFree 4.x with GeForce II (NVidia-made driver)