Turning Autosize on for any column has very bad consequences:
The whole grid or a section of it shifts to the left and those columns that got moved out of of view become inaccessible. Sometimes parts of the header disappear along with it, sometimes not?
Since the horizontal scrollbar disappears as well, these columns are 'lost' for good at runtime.
Haven't played enough with this bug to discern any pattern - but it's bad (absolutely unusable), both in IDE and at runtime.
BTW, how do you notify registered users of updates? Do you email me or do I have to keep checking the site?