Great. Thank you. Here's a little more info.
We are able to rollover the file names (the file name background turns yellow). We can delete the file. We can upload a new file. But we can not select the file.
Also, upon uploading a new file, we can not select the 'close' link or the red X.
On our end, we made new master files and tried uploading them (hope that doesn't count against our uploads). That didn't work. We cleared our WP cache. Still nothing.
We then tested loading them to our Rackspace account and they worked fine. So I have to assume that it is something on the server side. Please let me know what you find out.
Thanks