As some others have stated before, it looks like the labels of the Y axe in the Bar Chart are being rendered in reverse order and therefore don't fit the their related data anymore!

Please find a running live example here: http://aur.cc/sencha-bug

Data is specified as followed:

var store1 = new Ext.data.JsonStore({ fields: [],
data: [
{'name':'Ten ' , 'data1':10},
{'name':'Twenty' , 'data1':20},
{'name':'Thirty' , 'data1':30},
{'name':'Fourty' , 'data1':40},
{'name':'Fifty ' , 'data1':50} ]});

Wrong Output:
Bild1.png

Thank you for any comments on this issue!