I had synergy setup working fine with version 1.3.7, however I got a new computer and decided to set it up as well. Because the setup I was working with was ubuntu (server - dual monitors) mac (client) and the new computer (replacing the mac) was windows, I ended up updating everything to 1.4.10.

 ______ ______ ______
|  mac | ubu1 | ubu2 |
|______|______|______|

The problem is currently that dragging to the left of ubu1 causes the cursor on the mac to flicker briefly and then the cursor shows up at the bottom right corner of ubu2.

Here is my .synergy.conf

section: screens
    Andrews-Mac-Mini:
        ctrl = ctrl
        alt = meta
        super = alt 
    Andrew-Ubuntu:
end

section: links
    Andrew-Ubuntu:
        left = Andrews-Mac-Mini
    Andrews-Mac-Mini:
        right = Andrew-Ubuntu
end

And the output from synergys -f

NOTE: client "Andrews-Mac-Mini" has connected
INFO: switch from "Andrew-Ubuntu" to "Andrews-Mac-Mini" at 1679,451
INFO: leaving screen
INFO: screen "Andrew-Ubuntu" updated clipboard 0
INFO: screen "Andrew-Ubuntu" updated clipboard 1
INFO: switch from "Andrews-Mac-Mini" to "Andrew-Ubuntu" at 2398,833
INFO: entering screen