on 08-17-2013 09:33 PM
If you are getting that message, it means that eBay has made site changes that won't work in IE8. Either upgrade or use a different browser such as Firefox or Google (which both, by the way, work much better with eBay than Internet Explorer).
on 08-18-2013 08:51 AM
Even IE10 users are getting that browser upgrade message when trying to list - so no, it's not necessarily going to make a difference. This has been an ongoing tech issue with ebay for at least the past week or so when trying to list instead of relisting.
Try another browser and see what happens.
Or try using another form - ie, Sell Similar.