Repetier/Slic3r Update causing Y offset at same height on multiple prints (3 replies)

Repetier/Slic3r Update to .95E seems to be causing Y offset at same height on multiple prints. I printed Yoda a few times and then another model and they all had a shift on the Y axis at exactly the same height. After hours of testing I finally thought to uninstall Repetier/Slic3r and reinstall the older version .90C. The issue went away completely.

This is a custom printer with Ramps1.4 and Marlin firmware.

Anyone else have this issue? I noticed that when I opened Slic3r after downgrading, it showed the following:

10:30:43.290 : Unknown option support_material_interface_extruder
10:30:43.290 : Unknown option start_perimeters_at_non_overhang
10:30:43.290 : Unknown option start_perimeters_at_concave_points
10:30:43.290 : Unknown option standby_temperature_delta
10:30:43.290 : Unknown option ooze_prevention
10:30:43.290 : Unknown option thin_walls
10:30:43.290 : Unknown option first_layer_acceleration
10:30:43.290 : Unknown option overhangs
10:30:43.427 : Unknown option use_firmware_retraction


I assume it has to do with one of these since they appear to be in .95 and not .90. Any thoughts?