Had the same problem a couple of hours ago: Failed to prepare partial IU: [R]com.android.ide.eclipse.ddms 0.8.0.v200809220836-110569.
In the Eclipse log file (<workspace>/.metadata/.log) I found: !ENTRY org.eclipse.equinox.p2.metadata.generator 2 0 2009-04-19 19:17:15.101 !MESSAGE An error occurred while loading the bundle manifest C:\Apps \eclipse\plugins \com.android.ide.eclipse.ddms_0.8.0.v200809220836-110569.jar !STACK 0 java.util.zip.ZipException: error in opening zip file (more lines) When I looked there, the JAR file was corrupted. Turned out it was my anti-virus software (Avira AntiVir Personal) that was responsible for that. After I cleaned up Eclipse and switched off the anti-virus software, installation worked (for me ;-). Just for the record, I use Vista SP1 64bit, Eclipse Ganymede Version: 3.4.2 Build id: M20090211-1700, Android Update Site http://dl-ssl.google.com/android/eclipse/ (because https://... didn't work for me, something like "no repository found at ..."), and Avira AntiVir 9.0.0.387. --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en -~----------~----~----~----~------~----~------~--~---