Comment 4 for bug 803610

Curious why gsnaptics would resolve it - does it cause -synaptics to uninstall?

Anyway, since you guys could work around it, are you ok with that as a solution for natty, or would you like to see it properly fixed? If the latter, we'll need a full backtrace (the traces in Xorg.0.log aren't really that useful except just for proving it's an X crash.)