Comment 46 for bug 288111

(In reply to comment #35)
> Ehsan: why do you think this should block a dot release? Please renominate with
> rationale.

Without this patch, the headers for XUL trees cannot be correctly resized or reordered. The reordering issue is especially severe, because once the user drags a column and drops it at any specific location, the column will actually move to another location, and there is practically no way of getting the correct ordering back (unless the user understands the bug, and drops the column in the mirror of the desired location.)

While this doesn't affect LTR builds, it's a serious problem for RTL builds. On second thought, though, maybe it's too severe to ask for blocking here, but I think this is definitely wanted at least.

Also, please note that this affects Mozilla and XULRunner apps, as well as any extensions which use the XUL tree widget.