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Is this with one particular module or all modules? If all modules, what modules do you have installed? What happens when you hover your mouse over a module icon, i.e.: do you get the js popup menu?
I've seen situations when you have several modules installed that the admin section gets buggy. If you can track down the offending module, the remaining modules start working correctly again.
Insanity can be defined as "doing the same thing over and over and expecting different results."
Stupidity is not a crime. Therefore, you are free to go.