Hi ubuy-isell,
Thanks for contacting us regarding this matter. There is currently a known issue with Firefox 4.0 that causes it to perform poorly in conjunction with Java applets (such as the one used by the Auctiva Uploader) and it sounds like you are most likely being impacted by that problem.
We will have to wait for Mozilla to address that issue with the next update to Firefox but, assuming this did happen after you updated to Firefox 4.0. I believe you will be able to work around the problem by rolling back to Firefox 3.6.16 for the time being.
You can download Firefox 3.6.16 from the following page of the Mozilla website:
http://www.mozilla.com/en-US/firefox/all-older.htmlIf you are not using Firefox 4.0 or if you continue to encounter the same problem after rolling back to Firefox 3.6.16, please feel free to contact our customer support team by mousing over the "Help" tab on our site and selecting the "File Support Case" option.
-Mike
