Clicking on "hide this article" triggers the loading icon but the page isn't updated in IE6

• XE 1.9 SNAPSHOT 17115 + IE6 on WinXP
• Create a blog article
• Once on the article, click on the "hide" button (the small eye)
• The icon switches to the looping one
• The page isn't refreshed, the icon keeps looping but nothing happens
• However, if the article is edited we can see that the "is Hidden" box is ticked

The page should refresh itself once the action has been done (AJAX issue in IE6 probably).