The joys of Xorg and nVidia drivers

I just upgraded Xorg on my debian machine and most GTK 2 widgets lost their borders. How annoying. Turns out the latest xserver-xorg-video-nvidia driver isn’t compatible with the latest Xorg ABI but; this driver doesn’t tell you, a more recent version will complain:

================ WARNING WARNING WARNING WARNING ================
This server has a video driver ABI version of 11.0 that this
driver does not officially support. Please check for driver updates or downgrade to an X
server with a supported driver ABI.
(WW) NVIDIA: The driver will continue to load, but may behave strangely.
(WW) NVIDIA: This driver was compiled against the X.Org server SDK from git commit b6c7b9b2f39e970cedb6bc1e073f901e28cb0fa3 and may not be compatible with the final version of this SDK.
(WW) NVIDIA: This server has an unsupported input driver ABI version (have 13.0, need < 13.0). The driver will continue to load, but may behave strangely.

The solution was to carefully downgrade xserver-xorg-core to 2:1.10.4-1 (that required downgrading xserver-xorg-input-evdev xserver-xorg-input-wacom too). Back with Xorg ABI 10 and everything works ! I now have border on my widgets !

sudo apt-get install xserver-xorg-core=2:1.10.4-1 xserver-xorg-input-evdev=1:2.6.0-2+b1 xserver-xorg-input-wacom=0.10.10+20110203-1)