Wow - I ran Update on synaptic and apt-listbugs tells me that metacity segfaults after restart. I decide to risk it, as it won't stop me booting. The update finishes & I closed it & did Ctrl-Alt-BkSp to restart all the GUI stuff, X, Gnome, etc.
GDM looked slightly different, I logged in & Bam! Big surprise - no desktop. Gnome 3 had arrived.
I love it. There's a learning curve, & probably I need to do some manual cleanup after apt has "converted" my Gnome 2...

I got pretty wound up recently, trying to get Doom 3 working. I've recently bought a new Dell with a 4-core Phenom 830, 4 gig RAM,1 Gb ATI 5450 Video. I'm very pleased with it(I could only afford it 'cos it was on tick). After trying all the other mainstream distros I've settled with Debian - testing usually. apt alone is enough, but also I love many other things about Debian - their ethical stance for one. So I've installed Wheezy for AMD64 - it goes like a rocket.
I ran the doom3-linux-1.3.1.1304.x86.run...