There is nothing to share with G in those folders normally, no reason not to block them and no advantage to unblocking those folders. Those lines in your robots.txt are not very likely to be involved with AdSense display issues. In your GWT account you can ask it to test your robots.txt and you can see if something in there is preventing google from accessing URLs you want them to find. They may show hundreds of "Blocked" URLs, but the URLs are usually ones you don't want to share anyway.
Have you tried to see if AdSense has any known issues that might apply to your setup?