Question on default.ui vs. toolbar

[R. Lahaye]

Hi,

When I add in default.ui toolbar-Items as follows:

    Icon "math-mode"
    Icon "math-insert ^"
    Icon "math-insert _"

LyX will look for the following filenames as icon-images:

  math-mode.xpm
  symbol-insert_^.xpm
  symbol-insert__.xpm


Why does LyX change the last two in "symbol-..." ?
Why is this not "math-insert_^.xpm" and "math-insert__.xpm" ?


Am I misunderstanding a toolbar feature, or is this a bug ?

Rob.