Is it possible to successfully downgrade X to 1.10.99.* or earlier in 12.04?
I have tried with Synaptic->Package->Force Version, but it only shows me two versions of 1.11.4. Downgrading would restore some broken accessibility functionality that I rely on to use Ubuntu effectively.
Specifically, the LatchLock feature of Sticky Keys in XKB no longer works. Two bug reports: