Tracker 2939615 is posted against the JDiff plugin, but the actual fix is in View.java. The setMainContent class does not reset the splitPane nor the editPane fields, so subsequent calls to updateTitle don't work correctly as the split pane is not null when it should be, resulting in the title for the View being shown incorrectly. This patch fixes that.
patch to set internal fields so view title is displayed correctly
I probably submitted this in the wrong place, it's already applied to trunk. I entered a new tracker item, 2949473, to have this patch merged to the release branch.
r17256 was it.