"Flashing" when selecting a node/row on a tree/grid on an iPad

[lisser]

Hi,
I'm aware that there is Sencha Touch specifically for mobile devices. The screen resolution at least, is good enough to use some GXT components.
When selecting a node in a tree or selecting a row in a grid the whole tree/table "flashes" once as if it wants to give feedback to the user about his/her interaction. This behavior is not to be seen on a desktop browser.
It can easily be seen on the GXT examples (http://www.sencha.com/examples) like Basic Grid, Aggregation Grid, Filter Grid, Basic Tree, Async Tree, and of course in the navigation tree as well.

Any idea where this comes from and how it can be prevented?

[sven]

It might be due to the fact that the tree is focusable itself. Have you tried to make the Tree non focusable?