Step one. Go to Adobe.com and download the current full installer.

Don't know what the "full installer" is but have downloaded the current version many times. It could be a version problem. I'm running Vista and I'm not sure Adobe releases their most current version to Vista users as when I attempt to download the preferred version for Vista, a message says I already have a more current version. How it got there I don't know.

Have you checked with Adobe support?

I sent them a Tweet via Twitter notifying them of the problem and they have not responded yet so maybe they are seeing it too which would be good. I'm pretty sure it's an Adobe thing, but Mozilla Firefox's integration with Adobe products could be better for us non-technical types.

I've had a lot of problems with Adobe Flashplayer too recently until I learned just today to turn off a security function in Firefox.