Before you create a tour for 1.19 may be better to delete the folder vtour 1.18?
Then clear your browser's cache (sometimes works)
No way,
if I start tour_editor.html in FF,IE,Chrome,Seamonkey with empty cache, the icon in FLAT pano is huge anyway.
Maybe I give it up and will go back from 1.19 to 1.18.3 :-(