Hi. We started having display issue on our "frozen" column since we installed the last update.
We tought it was our fault, but look at this kendo dojo:
Scroll vertically to the middle, then scroll horizontally.
In version 2015 Q3 (2015.3.930), the "locked" table is continously scrolling from "0" to "current" and is blinking when you move the horizontal scroll bar slowly.
But, in version 2015 Q2 (2015.2.624), everything is fine.
I know that you fixed something related to the scrolling, we had trouble with padding on the right of the grid, and now that bug is fixed.
I don't know if that "fix" for the right side introduced a bug for the left side!