Navigation ADT's are inmost cases missing the truncate-text class on the "a elements" leading to text in submenu's to run off the width without any ellipsis. Found affecting "Bar Minimally Styled" in 7.0.
1) Add a Homepage in Public pages
2) Add a child page to it
3) Called "this is a really long sub title menu but can be encountered in sub menus"
4) In clean DXP 7.0 (no fixpacks) this text truncates correctly
5) In further iterations of Fixpacks the truncation is lost
Where sub menu items are in a width constricted drop down menus in particular, truncate the text using truncate-text class.
Run test under clean DXP 7.0 first, then upgrade it to DE-55 to see the change.
Review all Navigation ADT's
Add truncate-text class where CSS has gone missing