Here are other tests with squeak vm 3.4 :

$ squeak -version
3.4-1 #1 XShm Tue Mar  4 05:30:53 CET 2003 gcc 2.95.4
Squeak3.4 of 1 March 2003 [latest update: #5170]
Linux xombul.inria.fr 2.4.19 #2 Mon Aug 5 12:44:11 CEST 2002 i686 GNU/Linux
default plugin location: /usr/local/lib/squeak/3.4-1/*.so


--------------

Image 3.6 5429

"The SqueakMap master server is running another version (2.0) than the 
client (1.0). You need to upgrade the SqueakMap package, would you like 
to do that now?" {yes, no}

If I click {yes} : Everything works perfectely (no message, I can 
download and install what I want).
If I click {no} : Everything works perfectely too

---------------
Image 3.7gamma 5985

Eveything works perfectely (no question, I can install packages)

---------------
Image 3.7beta 5868

Everything works
---------------


I can conclude that 3.4 vm works perfectely but 3.7 vm has problems with 
my computer and probably others. Can somebody help me please ?


Damien