FreeBSD 8.2, sec.update -p3, switching between X and console prompt, /var full

[n dhert]

Hi,
I have FreeBSD amd64, 8.2-RELEASE,
I just applied the securtiy update p3 and now have
$ uname -r
8.2-RELEASE-p3

I have X running and KDE,
My machine is a virtual machine (Vmware)
After boot-up I got a graphical login window (as always), I wanted to
switch to a console prompt, so hit  Ctrl-Alt-F1
but there is now NO reaction at all (neither with Ctrl-Alt-F2,
...Ctrl-Alt-F8)
tried many times

In the past this was never a problem (in the pas also as a Virtual machine)
>From a different PC, I also connected to my FreeBSD machine
Got a graphical window, here I could, after two tries, get the console
prompt,
went back to graphical mode via Ctrl-Alt-F9, OK,
but now neither keyboard, nor mouse reacts to input ...
Went back to my first PC, now here the same situatuon:
graphical window, keyboard and mouse: no more reaction

Now I see, my /var is for 108% full
There was a huge file Xorg.0.log  16959946731 bytes
I deleted it, but still it remains 108% full and I can't create new file

How to solve this ???
help!