The menu doesn't show arrow because it can't calculate menu items width correctly due to necessary default CSS rules was removed from menu.min.css file. You can add the following CSS rule that fix it:
Code: |
#col2 .ux-menu .ux-menu-item-main
{
width: 200px !important;
}
|
About flickering problem, it seems this is IE specific issue and it can be caused by your custom CSS rules. You can investigate menu styles and HTML layout with help "Developer Tools" in IE 8, press F12 that see this tool.
Regards,
ARI Soft