HTTP 302 response to OAuth authentification ?

[Don-vip]

I'm getting some trouble to configure OAuth on the work notebook I've taken home for holidays :)

I don't know if this comes from this machine, if the OSM server is crazy or if it is a recent JOSM regression, but the OAuth authentification does not work with JOSM 4707. The error comes with this exception on the standard ouput:

org.openstreetmap.josm.gui.oauth.OsmOAuthAuthorizationException: L’autorisation de la requête OAuth '...' a échoué
	at org.openstreetmap.josm.gui.oauth.OsmOAuthAuthorizationClient.sendAuthorisationRequest(OsmOAuthAuthorizationClient.java:432)
	at org.openstreetmap.josm.gui.oauth.OsmOAuthAuthorizationClient.authorise(OsmOAuthAuthorizationClient.java:494)
	at org.openstreetmap.josm.gui.oauth.FullyAutomaticAuthorizationUI$FullyAutomaticAuthorisationTask.realRun(FullyAutomaticAuthorizationUI.java:533)
	at org.openstreetmap.josm.gui.PleaseWaitRunnable.doRealRun(PleaseWaitRunnable.java:79)
	at org.openstreetmap.josm.gui.PleaseWaitRunnable.run(PleaseWaitRunnable.java:125)
	at java.util.concurrent.Executors$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:662)

I've checked in debug mode: JOSM receives a HTTP 302 response (redirect) from the OSM server instead of an expected HTTP 200 (OK).

I've never seen that before, am I the only one with this behaviour ?