I've used this on many machines with no issues, but after a new install on a new machine, the sync is consistently off by 4 lines - if I start at line 1 on both left and right files, and scroll one line at a time with the mouse wheel (set to 1 line at a time), the left file doesn't start scrolling until line 6 on the right, at which point the left window is at line 2, and it consistently stays offset by 4.
I've used this on many machines with no issues, but after a new install on a new machine, the sync is consistently off by 4 lines - if I start at line 1 on both left and right files, and scroll one line at a time with the mouse wheel (set to 1 line at a time), the left file doesn't start scrolling until line 6 on the right, at which point the left window is at line 2, and it consistently stays offset by 4.