There are some //hacks (I believe related to [EXTJSIV-3638]), which are not working well. - This was not issueing in 4.0.2a.
[strike]In my setup, I have an East Region holding 3 children with Flex. The 2nd child is a Grid with an autoLoaded DirectStore. There now is a mask that will not remove after the store has loaded. Also is it displaying (massive) mispositioning.[/strike]
I have no clue what's going on here
I can only remove the mask from the store if I call the mask() on it, and only then the unmask() works.
Even when overwriting these methods, its masking:
Ext.data.Store.prototype.mask = Ext.emptyFn;
Ext.data.Store.prototype.unmask = Ext.emptyFn;
I cannot provide code/testcase for this.