It (the gui_s44_supplyradius.lua widget) loads fine at the beginning of the game but if you mouse over some units with a supply radius you get:
Error in DrawWorldPreUnit(): [string "LuaUI/Widgets/gui_s44_supplyradius.lua"]:316: attempt to perform arithmetic on local 'radius' (a nil value)
and the widget is removed. Curiously if you re-enable the widget and mouse over a boatyard/shipyard or boat/ship which has a supply radius then it works fine.
Also, since I already opened infolog.txt
CobError: Invalid piecenumber for emit-sfx (in scripts/gbrhuntii.cob:WorkingLoop at 70)
And the Brilliant-class russian ship has a buildtime of 1.
I was testing svn rev 2283.