(19:49:24) gniiii: here are the log i've got for the pb of auto update :
(19:49:24) gniiii: eclipse.buildId=M20060629-1905
(19:49:24) gniiii: java.version=1.4.2_10
(19:49:24) gniiii: java.vendor=Sun Microsystems Inc.
(19:49:24) gniiii: BootLoader constants: OS=win32, ARCH=x86, WS=win32, NL=fr_FR
(19:49:24) gniiii: Command-line arguments:  -os win32 -ws win32 -arch x86
(19:49:24) gniiii: This is a continuation of log file C:\workspace_head\.metadata\.bak_0.log
(19:49:24) gniiii: Created Time: 2007-03-27 12:12:28.705
(19:49:24) gniiii: ?
(19:49:24) gniiii: Mon Apr 16 19:47:42 CEST 2007
(19:49:24) gniiii: eclipse.buildId=M20060629-1905
(19:49:24) gniiii: java.version=1.4.2_10
(19:49:24) gniiii: java.vendor=Sun Microsystems Inc.
(19:49:24) gniiii: BootLoader constants: OS=win32, ARCH=x86, WS=win32, NL=fr_FR
(19:49:24) gniiii: Command-line arguments:  -os win32 -ws win32 -arch x86
(19:49:24) gniiii: This is a continuation of log file C:\workspace_head\.metadata\.bak_0.log
(19:49:24) gniiii: Created Time: 2007-03-27 12:12:28.705
(19:49:24) gniiii: Error
(19:49:24) gniiii: Mon Apr 16 19:47:27 CEST 2007
(19:49:24) gniiii: Error retrieving "plugins/org.eclipse.hyades.execution.win32.x86_4.3.1.v200611140100.jar". [Server returned HTTP response code: "404 Not Found" for URL: http://mirror.yoxos-eclipse-distribution.de/eclipse.org/tptp/updates/plugins/org.eclipse.hyades.execution.win32.x86_4.3.1.v200611140100.jar.]
(19:49:24) gniiii: org.eclipse.update.internal.core.FatalIOException: Server returned HTTP response code: "404 Not Found" for URL: http://mirror.yoxos-eclipse-distribution.de/eclipse.org/tptp/updates/plugins/org.eclipse.hyades.execution.win32.x86_4.3.1.v200611140100.jar.
(19:49:24) gniiii: 	at org.eclipse.update.internal.core.UpdateManagerUtils.checkConnectionResult(UpdateManagerUtils.java:561)
(19:49:24) gniiii: 	at org.eclipse.update.core.ContentReference.getInputSize(ContentReference.java:202)
(19:49:24) gniiii: 	at org.eclipse.update.core.FeatureContentProvider.asLocalReference(FeatureContentProvider.java:228)
(19:49:24) gniiii: 	at org.eclipse.update.internal.core.FeaturePackagedContentProvider.retrieveLocalJar(FeaturePackagedContentProvider.java:191)
(19:49:24) gniiii: 	at org.eclipse.update.internal.core.FeaturePackagedContentProvider.getPluginEntryArchiveReferences(FeaturePackagedContentProvider.java:179)
(19:49:24) gniiii: 	at org.eclipse.update.internal.operations.UpdateUtils.downloadFeatureContent(UpdateUtils.java:628)
(19:49:24) gniiii: 	at org.eclipse.update.internal.ui.wizards.InstallWizard2.download(InstallWizard2.java:428)
(19:49:24) gniiii: 	at org.eclipse.update.internal.ui.wizards.InstallWizard2.access$3(InstallWizard2.java:399)
(19:49:24) gniiii: 	at org.eclipse.update.internal.ui.wizards.InstallWizard2$3.run(InstallWizard2.java:352)
(19:49:24) gniiii: 	at org.eclipse.core.internal.jobs.Worker.run(Worker.java:58)