Some icons in the applications folder have a "not" icon over them. (The no smoking symbol icon, but in white.) Open Office had one up through recently. Oddly, I had successfully opened it to test and it still had the "not." I just opened a file in it from the file system in it and the "not" is gone. Now Dropbox has it. Two questions:
1) Does the "not" icon mean partially installed?
2) Does anyone know what the icon is called so I can search for more information about it.
It means that the application has been downloaded but never loaded. When you open the app you'll get a warning and once dismissed, the icon will assume its normal appearance (although sometimes is sticks around for a bit -- I think the menu caches the icons for a time).
It's weird though. I had open office open. I typed something in it. With dropbox, I had loaded it and addressed the prompt. Then I rebooted and now it's gone. Maybe it registers the load late or on application shutdown? I had gotten the warning for both apps and still had the "not"