id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
4740	Map view sometimes turns black	bilbo	team	"I upgraded JOSM to version 3139 and I noticed that sometimes the map view turns black briefly for some time.

I found a way to trigger this bug - load some data with duplicate nodes in it, then run validator byt pressing the ""Validation"" button. Click once on the ""Duplicate nodes"" header and map view will turn black except some small rectangle (some problem with offscreen buffers?), though doing anything else (scrolling, doubleclicking the ""Duplicate nodes"" to select the duplicated nodes, etc ...) will cause the map view to redraw normally.

I am running JOSM on linux."	defect	closed	minor		Core	latest	fixed