I have deleted the troublesome new blog and started again only to find exactly the same problem. I cannot use the design wizard and have never had this problem before. has it got something to do with the recent changes? I tried again this morning and again managed to get into uploading image, text colour background etc, then it suddenly reverted back to 'this page can't be displayed' or 'script error' java script is activated on my pc-why am I able to use the design wizard one minute and not the next? it's getting extremely frustrating.......
Help!!!!

nittygritty
Pro 
Please do not write 3 posts for one issue but keep us updated
in one. Did you upload the same image again and which blog is it?
Could you send an email with the codes you've entered to support?
Which browser do you use and which plug ins/ add ons are active?