iarwain I offer you my condolences. My father also passed away in 2003 and if there is something good I can say to you at this situation is that, as the time goes by, your pain will relief. But I know that it is a difficult moment.
The problem I'm having now is some text jittering. I've attached a minimum project that reproduces the problem. I've tested on my 2 computers.
Move the square in one direction for a while and you will sart seeing the text jittering. And the background also jitter on the window's borders.