So I turned back to Debian Lenny. Especially since it's now “frozen” as it's supposed to be approaching a stable release, I hoped it would offer me a reliable experience.
More thoughts here
The last time, I was still on openSUSE 11.0, running GNOME and a few KDE3 applications, and I was mentioning that Antidote RX v6 (a French language grammar and spelling checker) was only able to run as a standalone application, but not as an OpenOffice.org add-on, which is a serious showstopper for me.
That's too bad, because the OpenOffice.org 2.4 provided by openSUSE is otherwise very nice, and I appreciate the integration with the GNOME open/save dialog, something that not all the distros have. But it was specifically under openSUSE 11.0 that the Antidote RX v6 add-on can't be loaded.