CrunchBang Linux

I think problem exist in chosen theme. Now I'am using "NOX" theme and there appeared the same problem.  I found fix for this, just needed   edit theme file "gtkrc" in /usr/share/themes/NOX/gtk-2.0 folder and comment line "#gtk-menu-popup-delay    = 100". Just put # before  this  line "gtk-menu-popup-delay    = 100" or just delete this line and save the file . Then change theme, apply and again choose theme you liked and apply. I hope this will help, this "bug" i think may appear in other themes.