The display of technotes on the timeline appears to have been broken
by check-in [51510bfcea809c5a].  Technotes are drawn with a check-in
node instead of being drawn without a node as they should be, and as
wiki changes are drawn.  To see this, visit:

   *  [/timeline?y=e]

I bisected the problem as follows:

   *  [/timeline?bid=y1aab3f3178n0fd79a3e09n786d6167fayfff033fe6fy7193681a84n76f4e009f9n9002a80ad6nd19df6161fne008e051cdn51510bfcea]