Comment 6 for bug 591656

weird. there's only one patch between 1.1.2 and 1.1.3 and that was the removal of the auto-scaling of the right edge (which broke scrolling on every touchpad I tested/emulated). just to be sure, please check that there aren't any distro-specific patches that may affect this.

If you remove the settings for the touchpad (except the edge scrolling on) from the config file do you still see the issue?
please enable shmconfig and run synclient -m 20 while moving the finger across this line. At what coordinates does the cursor jump?
also, I think the log file may help at this point, please attach this as well.

I'm beginning to think that the issue may be coordinates outside the kernel-reported range (which may make this a semi-duplicate of #23102).