I do not use "Minimize -> Systemtray". But I did have program minimized.
I have tried with program maxmized, but it is still the same.
When I use "+Pixel" in Internet adjustments it is better but I still see program menu, like this
The month graph with all internet sensors is OK, but I have noticed that the individual sensor month graphs also have the same problem. You can see the problem at my web page http://batdan.dyndns.org/weather/wswin/