Same problem! All of your sites using this Robots.txt setting are showing this problem.
I think the problem occurs because we excluded Disallow: /Components
Strange enough if we use the "Fetch as Google" option in google webmaster tools. The only thing he will say is this:

http://XXXXX/resources/shared/scripts/dnn.jquery.js?cdv=243 temporary not available

If i use the robots.txt-tester. It show no warnings and no Errors.
A week a go I did remove the /resources from your Robots.txt to check if that was a solution but still it will show this error.

----------------Robots.txt------------------------------------

User-Agent: *
Disallow: /admin
Disallow: /App_Code
Disallow: /App_Data
Disallow: /App_GlobalResources
Disallow: /bin
Disallow: /Components
Disallow: /Config
Disallow: /controls
Disallow: /Install
Disallow: /obj
Disallow: /Properties
Disallow: /Providers
Disallow: /upload

Hi Everyone- thanks for your replies

After several different tries, I was able to figure out a solution. Basically, between the modules, and the portals, I had to allow the following in order to resolve all of the errors coming up after running a google fetch and render report- Here is the robots.txt I ended up with. Note that not only could it not access the JS of the skins themselves, but also for the modules. 

User-agent: Googlebot

Disallow: /*/ctl/ # Googlebot permits *

Disallow: /admin/

Disallow: /App_Browsers/

Disallow: /App_Code/

Disallow: /App_Data/

Disallow: /App_GlobalResources/

Disallow: /bin/

Disallow: /Components/

Disallow: /Config/

Disallow: /contest/

Disallow: /controls/

Allow: /DesktopModules/

Disallow: /Documentation/

Disallow: /HttpModules/

Disallow: /images/

Disallow: /Install/

Allow: /js/

Allow: /portals/

Disallow: /Providers/

Disallow: /Resources/ContentRotator/

Disallow: /Resources/ControlPanel/

Disallow: /Resources/Dashboard/

Disallow: /Resources/FeedBrowser/

Disallow: /Resources/OpenForceAd/

Disallow: /Resources/Search/

Allow: /Resources/Shared/

Disallow: /Resources/SkinWidgets/

Disallow: /Resources/TabStrip/

Disallow: /Resources/Widgets/

Disallow: /Activity-Feed/userId/ # Do not index user profiles