Recently, several machines receive the following error when clicking on the email address in a contact to compose a new email:

User Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; Win64; x64; Trident/4.0; .NET CLR 2.0.50727; SLCC2; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C; Tablet PC 2.0; Creative AutoUpdate v1.40.02)
Timestamp: Thu, 3 Feb 2011 19:52:28 UTC


Message: 'YAHOO.SUGAR.ClosableTab' is null or not an object
Line: 5154
Char: 9
Code: 0
URI: http://www.infotechexchange.org/Suga...grp_emails.js?


Sugar CE Version 5.5.2 Build 1224

Users are Win XP and Win 7

Browsers are IE 7 and 8, Chrome.