I can see these widgets in your sidebar on that blog: search, recent posts, archives, categories, meta. If you go here > Appearance > Widgets you can replace them with widgets of your own choice. If you cannot see the widgets I can see on your blog and/or you cannot move them on the Widgets page, then you probably have a browser issue.
Exactly which browser and version of it are you using? If you don’t know click here to find out > http://whatsmyuseragent.com/
Have you tried clearing your browser cache and cookies? http://www.google.com/support/accounts/bin/answer.py?hl=en&answer=32050
Is your browser version up to date? You can upgrade any browser version here. http://browsehappy.com/
Have you tried using the browser with all extensions or add-ons disabled?
Do you have third party cookies enabled? http://support.google.com/accounts/bin/answer.py?hl=en&answer=61416
Do you have another browser you can try?