When I'm in my Blogger post template, via Firefox 2 browser, and I click on Add Image, I get that stupid StumbleUpon site, in the window where Blogger photo/image upload dialog box is supposed to appear. So I can't browse my image files and select a photo to upload to a post. Firefox Bug Forum.
Update: I went to Tools > Add-ons in browser chrome at top, and Uninstalled StumbleUpon, which took effect when I Re-started Firefox 2. That damn StumbleUpon shit was coming up, even when I went to Firefox Start Page. Talk about intrusive nagware.