TYPO3 Core

showButtons (
some, buttons,
as, comma, seperated,list,
chMode, removeformat, copy, cut, paste, pastetoggle, pastebehaviour, insertsofthyphen,
undo, redo
)
toolbarOrder ( order as you like it )

This does NOT show the undo and redo buttons

showButtons (
some, buttons,
as, comma, seperated,list,
chMode, removeformat, copy, cut, paste, pastetoggle, pastebehaviour,
undo, redo, insertsofthyphen,
)
toolbarOrder ( order as you like it )

This DOES show the undo and redo buttons,
mind the insertsofthyphen button has changed the positioin in the list.

Confirmed this at my sites, but they are all more or less the same setup at all.
Maybe some systematical error I do?

Would be nice if you could have a look on this,

thank you,

Christian.