I recently just installed Movable Type and the first time I logged in the navigation drop down menus worked as expected. Since then, I have logged in and out many times but to no avail, as those drop downs do not appear upon hover. Second problem I've encountered is the inability to click and type within the text box on the new post page. Any help is much appreciated.

Do you see any JavaScript errors?
Are you accessing the site on the same URL as before (www.domain.com and domain.com are different) and it matches what is set as the CGIPath.

I don't know where to look for JavaScript errors, but that must be it. Also, I just looked for the mt-config file I don't see one there despite completing the MT wizard. I still have the "original" file. Should I make that the regular mt-config file? And will that do anything to help?

In IE if you have a JavaScript error you should see an warning icon at the bottom left of the status bar, in FF with developer toolbar there is a red x in the bottom right.

Without an mt-config file it shouldn't be working at all. Try manually creating mt-config (rename the original file and update the settings to match your config)

I use Safari. And the config file did not do the trick.

I tried it in Firefox and I do have a javascript error.

Do you publish to the same directory that mt.cgi is in?

I recently installed MT4 and have gotten the same problem. The issue is that the default mt.js file in the main directory gets overwritten by the "Javascript" index template, which outputs to mt.js. When I first installed, it had the good js file. Once I publish the site, mt.js is overwritten with a much shorter version that doesn't work. Deleting the published js file and replacing it with the one from the install solves the problem... until I publish again

I haven't figured out exactly how I want to fix this problem yet, would definitely appreciate advice from some more advanced MT users. I was thinking of just replacing the "Javascript" index template with the good file, but maybe that will cause some other issue.

You should not be publishing to the directory where MT is installed.