I had previously configured an auto-install of JDK6 for doing an Android build. Due to this (http://groups.google.com/group/android-platform/browse_thread/thread/de555a2f3029ab1a) bug, I decided to install an auto-install of JDK5 as well. After the auto-update of Jenkins via Ubuntu Software Center this morning, I went to configure it but was unable to (on the new JDK or the previously configured JDK). The drop-down shows 3 values (JDK 6, JDK 5.0, JDK 1.4) but will not allow any to be selected. The previously configured one does not show any selected either. The Auto-install for Ant does not have the same problem. Tried in Firefox and Chrome with the same results. You can see in the attached screenshot that the row is not even selectable by the cursor (or keyboard actually). It worked fine last week.