There is a problem in all Joomla versions on IE8, you get an error message and a 403 redirection when trying to login to the frontend.After many searches, i found these solutions:
Change or recover Joomla Administrator password
If you forget the admin password it can be a little mess recovering it.
Remove link count from website statistics
If you want to remove the count of links from the statistics module and leave only the important stuff do this:
Show empty categories in section
When using Joomla 1.0.x + (not 1.5), if you create a menu item linking to a section – this will list and link to the categories. In the Joomla admin you can select "show empty categories" – but this option wont always work.