If you are experiencing issued using the new version of blog-city under IE, it could be the new IE 7 security.
Its easy to fix. Just open IE. Go to the Tools(1) menu in your browser top bar. You should find it by default in the top right of the window. From the drop down menu choose the Internet options.

This will bring up a pop up window of settings. You need to choose the Privacy(3) tab. From the row of buttons, choose the first one Sites(4). This will pop up a further window of settings.

Type into the edit field your blogname(5). You do not need the http://, it should be just like this: blogname.blog-city.com and then click the Allow(6) button to trust your blog.

Hit Ok to close the window, Ok again to close all the settings windows.
Finally, close your browsers, all of them and then open one browser. Test your blog. It should now be working a treat!