I also installed the new version. Imported products from 4.3.2 and everything else. The product tabs are not working.
In IE I get an javascript error:
Webpage error details
User Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; WOW64; Trident/4.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C)
Timestamp: Fri, 6 Aug 2010 06:01:16 UTC
Message: 'd.cookie' is null or not an object
Line: 15
Char: 359
Code: 0
URI:
http://www.myurl/xcart1/skin/common_files/lib/jqueryui/jquery.ui.tabs.min.js