The corollary of ‘measure twice, cut once’ for computer use is something like, ‘README twice, click ‘upgrade automatically?” once.
I knew — somewhere, just not front and center — that the auto-upgrade feature of WordPress would overwrite any code you may have inserted into the ‘classic’ or ‘default’ themes. So, the sidebar and footer are ‘default’ now.
I knew that.
I think I have backups around here, somewhere… (/rolls eyes)
We are still on the interwebs, albeit in a more passive role most times.
Time for blogging is constrained by
It’s the ‘etc.’ that really eats into free (blogging) time.
I just upgraded the software running the back-end to WordPress 2.3.2 and inadvertently deleted my side bar with my personalizations.
Sigh. Measure twice, cut once.
Yes, I have a back up, but still there is that whole, “pay attention!” thing dancing around in the back of my head…
The next version of WordPress (2.3) is scheduled to be released on the 24th. Aaron Brazell has helpfully posted 10 Things You Need to Know About WordPress 2.3, which covers some of the new features like integral tagging, update notifications, redirection, post workflow improvements, multiple category widgets and the new pluggable RSS library. I have no opinion on the changes to $wpdb->prepare(). I tend to ignore things I so completely do not comprehend. 
Folks using other things like Blogger or folks using WordPress on wordpress.com need not be concerned.