What I also noticed: I have a CellTable/DataGrid with EditTextCells, which so use input text fields.
Within the onBrowserEvent() I can see that mouse clicks are received. BUT the cursor selection within text in the edit fields does not change.
I can move the cursor by Arrow Keys, but not by Mouse Clicks.
Tried this from different machines and different browsers, so it must be within my application.
That's very strange that this behaviour is the same vor all available input fields. Wether they come from a TextBox or are inside a CellTable es EditableTextCell, they just don't care...