I work at Automattic/WordPress.com, and we've received a couple reports that Jetpack is causing problems with your Easy Adsense Lite plugin.
I'm reasonably sure the problem is that, under certain configurations, Jetpack will call
get_the_excerpt() (which applies the
the_content filter) prior to any posts being displayed. That ends up incrementing the
EzAdSense::$ezCount variable, which can prevent the Easy Adsense ads from showing up in posts if that variable gets incremented past the
It might be possible to fix this issue in our Jetpack plugin, and we're looking into it, but I've thought of a couple options that may increase your plugin's compatibility with other plugins (and themes).
The first: https://gist.github.com/4273896
Only output ads for posts in the loop. If a plugin or theme calls the_content outside of the loop, no ad will be output (and the incrementor won't increment).
The second: https://gist.github.com/4273972
When Jetpack calls
get_the_excerpt() on a post with no excerpt, WordPress automatically generates an excerpt from the post's content (via the
the_content filter). This patch prevents ads from showing up (and the incrementor from incrementing) in these generated excerpts.
It seems like the first patch is probably more useful for you.
As I said, we're looking into fixing this in Jetpack, but wanted to pass these thoughts along to you in any case.