The only reliable way I have found is to get a short link that does not contain any "%" - the BBS software seems to truncate links when it encounters some special characters.

For a single item, I go to the Advanced Search and use the Search by Item Number - this returns a nice clean short link - like this one for the link you posted.

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=320088766218

Chas