Steps to reproduce

1. run attached zul and ViewModel. (There is a Grid with one frozen column.)
2. visit the zul with Safari 5.1
3. use finger to drag to the right to show more columns

Actual:

the frozen column is moved by dragging.
Before dragging, the first column contains "row 1, row 2, row 3..."

After dragging, the first column is moved.

Expected:

the frozen column should not be moved by dragging.

Extra Information

the same page looks like in Chrome on PC