I seem to have the same problem on Lucid (0.6.95-1ubuntu6). I check tracker-status, and it reports 'Paused'. But the tracker-applet had 'Pause All Indexing' unmarked. So I selected 'Pause All Indexing', tracker-status still reported 'Paused'. I then unselected 'Pause All Indexing', tracker-status now reports 'Idle', and trackerd goes to sleep.
Next time this happens I will try to collect some more information.
I seem to have the same problem on Lucid (0.6.95-1ubuntu6). I check tracker-status, and it reports 'Paused'. But the tracker-applet had 'Pause All Indexing' unmarked. So I selected 'Pause All Indexing', tracker-status still reported 'Paused'. I then unselected 'Pause All Indexing', tracker-status now reports 'Idle', and trackerd goes to sleep.
Next time this happens I will try to collect some more information.