I also got something like this today on jaunty. The 'Cancel' and 'Ok' buttons dismiss the dialog, when is then respawned. The 'Reindex All Contents' button does seem to do something. At least, when I click it I get a second, scarier dialog about how it's going to take forever and do I really want to do that. Not very useful since there appears to be only one choice here.
I also got something like this today on jaunty. The 'Cancel' and 'Ok' buttons dismiss the dialog, when is then respawned. The 'Reindex All Contents' button does seem to do something. At least, when I click it I get a second, scarier dialog about how it's going to take forever and do I really want to do that. Not very useful since there appears to be only one choice here.