CSS Menu glitch on mouseover

[Dennismn]

I have an old CSS menu from CSSPlay (click here to see original), which serves quite well up to now, but every now and then, I have this odd glitch.Normally, the various submenus display when you mouseover the main title, but on this page (click here to see source page), mouseover triggers all the submenus to display.My problem is that there's no error in my consoles in order to track this bug.Is there something I can use to determine what's happening or can someone help me find the culprit?I can add the page's code, but it's quite lengthy, that's why I linked to the page in question which is in ASP Classic VBscript with jQuery.Thanks in advance and let me know if you need more info.