id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
2670	java.net.MalformedURLException: no protocol: /	phobie	team	"Revision: 1621
CMD-Line: java -Xmx1024M -Dsun.java2d.opengl=True -jar josm-latest.jar
OS: Debian/sid

After removing ~/.josm/ the error disappeared.
BTW. The splash-screen stays open for several minutes until the main-window opens! Probably a problem of the remotecontrol plugin.

Log:

OpenGL pipeline enabled for default config on screen 0
loading plastic_laf
loading remotecontrol
java.net.BindException: Cannot assign requested address
        at java.net.PlainSocketImpl.socketBind(Native Method)
        at java.net.PlainSocketImpl.bind(PlainSocketImpl.java:359)
        at java.net.ServerSocket.bind(ServerSocket.java:319)
        at java.net.ServerSocket.<init>(ServerSocket.java:185)
        at org.openstreetmap.josm.plugins.remotecontrol.HttpServer.<init>(HttpServer.java:37)
        at org.openstreetmap.josm.plugins.remotecontrol.RemoteControlPlugin.restartServer(RemoteControlPlugin.java:43)
        at org.openstreetmap.josm.plugins.remotecontrol.RemoteControlPlugin.<init>(RemoteControlPlugin.java:22)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
        at java.lang.Class.newInstance0(Class.java:355)
        at java.lang.Class.newInstance(Class.java:308)
        at org.openstreetmap.josm.plugins.PluginInformation.load(PluginInformation.java:155)
        at org.openstreetmap.josm.plugins.PluginHandler.loadPlugins(PluginHandler.java:148)
        at org.openstreetmap.josm.gui.MainApplication.main(MainApplication.java:170)
loading slippymap
loading usertools
loading validator
loading wmsplugin
org.openstreetmap.josm.io.OsmTransferException: java.net.MalformedURLException: no protocol: /
        at org.openstreetmap.josm.io.OsmApi.sendRequest(OsmApi.java:544)
        at org.openstreetmap.josm.io.OsmApi.initialize(OsmApi.java:141)
        at org.openstreetmap.josm.io.OsmServerReader.getInputStream(OsmServerReader.java:47)
        at org.openstreetmap.josm.io.BoundingBoxDownloader.parseOsm(BoundingBoxDownloader.java:96)
        at org.openstreetmap.josm.actions.downloadtasks.DownloadOsmTask$Task.realRun(DownloadOsmTask.java:53)
        at org.openstreetmap.josm.gui.PleaseWaitRunnable.run(PleaseWaitRunnable.java:101)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
        at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
        at java.util.concurrent.FutureTask.run(FutureTask.java:138)
        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
        at java.lang.Thread.run(Thread.java:619)
Caused by: java.net.MalformedURLException: no protocol: /
        at java.net.URL.<init>(URL.java:567)
        at java.net.URL.<init>(URL.java:464)
        at java.net.URL.<init>(URL.java:413)
        at org.openstreetmap.josm.io.OsmApi.sendRequest(OsmApi.java:458)
        ... 11 more
"	defect	closed	major		Core	latest	fixed	exception BoundingBoxDownloader MalformedURL remotecontrol