It seems to be an old issue, but I am having this problem with version 4.3.1. After row move (drop), column widths are randomly changed, while column header widths stay the same.

This is only on Chrome and recently reproduced on Safari.

Firefox and IE seem to be fine, I couldnt reproduce it there.

I figured I need to be a litle more descriptive:

After resorting rows ajax request is posted to the server to save new row order and some processing.