There are also some bugs with qt and gtk2 widgetsets under linux:
SCROLLBAR RELATED (applies to qt and gtk2 ws under linux, also qt under win32)
1.Grid works ok (moving scrollbar slider by mouse, wheel and moving cells by keyboard)
2.Planner, TreeView and ListBox aren't ok when moving scrollbar slider by mouse, wheel and keyboard are ok.
How to reproduce: put TMSFNCListBox on form (there are already 5 default items), shrink height so only 3 items are visible,
start app, click scrollbar slider and move it down to the end - last item isn't visible. When you do same thing with mouse wheel it's ok, also with keyboard it scrolls to the end (pg up/down, or up/down arrows).
KEYBOARD RELATED (applies to all LCL widgetsets I guess)
3.GRID - when I type letter in cell it opens editor cell - that's fine until I type some non ascii chars. eg šđčžć , you should use OnUTF8KeyPress in case of LCL, so it passes letter to the editor not question mark.
Hint: LCLQt is supported on Mac too.
Thanks.