Grid Sorting stops working after column's place be changed

[Arkilus]

How it happens: After i CHANGE a grid's column place (not just move and leave it on current place) all the sorting feature goes away till you try to move or resize a column.
For better explanation i've made a video:

http://arkilus.ar.funpic.de/extbug/

[jack.slocum]

This has been reported and is fixed already in SVN. Thanks.