Be careful with Etch or Testing in sources.list
Just something obvious, but you might likely forget or overlook.
Now Etch has become stable, be sure that your sources.list points to the Etch to the stable branch, and NOT to the testing branch.
I made the mistake of leaving "testing" in, and I did a dist-upgrade to become up-to-date.
However, this machine is (now was) a production machine, and was never intended to run something which moved out of unstable two weeks ago.
There are reasons to point to testing (if you want to keep running a fairly updated system, always, regardless of the current name of testing). In all other cases it might be better to refer to the branch by name.
Unfortunately, some of my most important applications broke (GLX in the nvidia driver and vmware). Downgrading to stable from testing has never been a good idea, so I am afraid I will end up with a fresh install of Etch.
You have been warned!
PS. On the bright site, oblivious of running Lenny/Sid, I was very surprised and pleased with a lot of new versions of other programs which were just great. A nice preview of the future!