I did an auto-update last night that it said came with a Flash player in the 26 item content. This morning shortly after I logged into Firefox and started viewing a slideshow this notice popped up:

"Failure to download extra data files

The following packages requested additional data downloads after package installation, but the data could not be downloaded or could not be processed.


The download will be attempted again later, or you can try the download again now. Running this command requires an active Internet connection."

I've never seen this notice at any other Flash upgrade, so I'd like to know a: what it is, and b: should I follow the instructions?
I'm using Firefox 20.0 Mozilla Firefox for Ububtu cannonical running under Ubuntu 12.04

If this was supposed to be posted in a different forum, please excuse the error.