WindowShade inside ViewStack gets clipped after expanding many tabs

[nicoulaj]

Originally filed by [email protected] on 2010-12-07T10:03:20

What steps will reproduce the problem?

1. Create a windowshade inside viewstack with a lot of tabs, with about, say, 30 checkboxes in each tab and in single column.
2. Go on expanding tabs. ScrollBar appears.
3. At some point the windowshade gets clipped and anything below that, even outside windowshade gets invisible.
4. Collapse the tabs one by one, eventually it returns to normal

What is the expected output? What do you see instead?
Expanding should proceed as expected.

What version of the product are you using? On what operating system?
flexlib 2.5, Flex 3.5 SDK, Windows XP.

Please provide any additional information below.
When placed outside viewstack, everything works fine. I have added resizeToContent="true" clipContent="false" to viewstack