Several days chart had black background (whole area of chart was black, without any plotted data, even instead of text marks was little dark green boxes).
I'll been waiting - and at present time chart is functioning normally. Thanks!
Probably because of non-standard webpage (comparing to a most of other BOINC projects), Lattice's statistics displayed at gridrepublic's HOME tab for the Lattice is always zero. Maybe gridrepublic's HTML-parsing for this particular project is required?
Chart has been drawn correctly since my latest post until today.
Today I can see again chart as (from left, -60 days to right, today): zero line, thin negative spike near -20 days, thin positive spike, zero line again...
Digital "points" (under chart) works very well - they are updating after every refresh and are equal to my current progress in projects.
But CHART does not updating - since the time of my registration at GridRepublic the picture is the SAME (was not changed)... I tried logout and login after several days - no change in this chart picture.