I updated to RC1 today and I found two problems with the design. The button text is not centered anymore and in the combobox the "selector" to the right is missing. The first one is how it looked with the beta and the second one how it looks with RC1.
Looks like the Tabs are also broken!
First one is how it looked with older version of ExtJS, second one how it looks in RC1 and last one how it looks without customizations in style. The tabs are too small for the text!
I have this problem as well. Using ext-all-scoped.css causes tabs and buttons to appear truncated. Additionally, the icons and text overlap.
There is one exception that goes the other way. I use a few numberfield controls with ranges on a window. They appear incorrectly using ext-all.css. There is a gap between the input field and the spinner controls. Using ext-all-scoped.css the controls render correctly.