Version: 0.6.9 (SVN r3447)
Using Qt 4.5.1 (compiled with Qt 4.5.1)
Watching My Big Fat Greek Wedding on DVD in Win2000 with DVD Player 6, menu options (slanted) appear with a fancy "underline" in blue. On WinXP, using SMPlayer, the menu options appear as (horizontal) light gray/white rectangle, placed more-or-less on the option, covering it completely. Selection works OK, but is sluggish. (My XP system is not licensed to use DVD Player, hence SMPlayer.)
You should send your request to the mplayer developers. I can't do anything about it.
Remember: smplayer is just a GUI for mplayer.