warning after update to wp 3.5

Above solution removes the warning… I must then re-select the icons for each category (OK, I can do that). Upon selecting the icons they show up on the page, but upon saving (clicking “Select Icons” at the bottom of the Select Category Icons page), they don’t show up, and instead display broken links on the Select Category Icons page (broken links appear to point to
“http://www.sitename.com/wp-content/uploads//”
instead of
“http://www.sitename.com/wp-content/uploads//image_name.jpg”
Please advise…