Had this problem on my end - went through Xara support and they sent me the following link...
http://blog.timwarr.net/2008/09/29/forcing-compatibility-mode-in-ie8-when-users-view-you-page/
...
Type: Posts; User: cbrandal; Keyword(s):
Re: My sub menus disapear as soon as the cursor leaves the main button
Had this problem on my end - went through Xara support and they sent me the following link...
http://blog.timwarr.net/2008/09/29/forcing-compatibility-mode-in-ie8-when-users-view-you-page/
...