Yes. It is a bug.  I did not test it when running in full screen mode.

Please modify the following code in [b]function dvalue[/b]:
modify from
[code]
else if(unit==0.05)out=((int)(v*100.+dv)/5)/20.;
[/code]
to
[code]
else if(unit==0.05)out=((int)(v*20.+dv))/20.;
[/code]
The above simulation has been updated,too!