[cross-project-issues-dev] VERY BIG Issue with Eclipse Editor and Arrow

[GF <ganfab@xxxxxxxxx>]

Since two days I cannot use anymore the "arrow keys" and "backspace" in the Eclipse Editor.
In few words.. when I'm editing a .java file or .xml or every kind of file.. and I press "Left Arrow, Right Arrow, Up Arrow, Backspace.. and so on".. nothing happens!!!!
Using "Ctrl+Left Arrow" or stuff like that.. works!

The arrow key works perfectly in the other part of the IDE and in my OS. They works in Eclipse too, if I go in the package explorer i can browse around using arrows..

I installed the same stuff, on a clean windows installation.. and I get the same error.
I tryed to create new Workspace too.. I create new very simple project with a simple java class.. and arrow keys don't work.

I also tryed with latest version of Java 1.5.. same problem!
I tried with Eclipse 3.4 M3.. same problem!
I tried with a June version of Eclipse 3.3.. same problem.

My first impression was that I have a problem with my PC / operating system and i was ready to format it.. but setting up my work environment on another pc (java+eclipse+tortoiseSvn) i got same problem!

The most incredible thing is that since 2 days ago everything was working fine. And I think i didn't updated nothing "special", the only updated thing maybe was some Windows Updates.. 
And another incredible thing is that all my workmates have no problem at all. (of course i cannot ask them to re-install everyhing from scratch..)

Is there a way to understand what's wrong when I hit the arrow keys inside the Eclipse Editor? somekind of "debugging mode".

I am using (but i tried many configurations!!! as i told you before..) :

Windows XP SP2 Professional editon, Fully Updated

Eclipse Platform
Version: 3.3.1.1
Build id: M20071023-1652

java version "1.6.0_03"
Java(TM) SE Runtime Environment (build 
1.6.0_03-b05)
Java HotSpot(TM) Client VM (build 1.6.0_03-b05, mixed mode, sharing)