* Too strict poll functions for render & display panels.
* Like said in the report cache & vertex groups are a part of the particle system (not particle settings) they can't be shown when the settings are pinned.
ui/ --> startup/bl_ui
op/ --> startup/bl_operators
scripts/startup/ is now the only auto-loading script dir which gives some speedup for blender loading too.
~/.blender/2.56/scripts/startup works for auto-loading scripts too.